| 1975 nv-01-6 January 1975 nv-01-7 February 1975 nv-01-8 March 1975 nv-01-9 April 1975 nv-01-10 May 1975 nv-01-11 June 1975 nv-01-12 July 1975 nv-02-1 August 1975 nv-02-2 September 1975 nv-02-3 October 1975 nv-02-4 November 1975 nv-02-5 December 1975 | 1976 nv-02-6 January 1976 nv-02-7 February 1976 nv-02-8 March 1976 nv-02-9 April 1976 nv-02-10 May 1976 nv-02-11 June 1976 nv-02-12 July 1976 nv-03-1 August 1976 nv-03-2 September 1976 nv-03-3 October 1976 nv-03-4 November 1976 nv-03-5 December 1976 | 1977 nv-03-6 January 1977 nv-03-7 February 1977 nv-03-8 March 1977 nv-03-9 April 1977 nv-03-10 May 1977 nv-03-11 June 1977 nv-03-12 July 1977 nv-03-13 August 1977 nv-03-14 September 1977 nv-03-15 October 1977 nv-03-16 November 1977 nv-03-17 December 1977 |
| 1978 nv-04-1 January 1978 nv-04-2 February 1978 nv-04-3 March 1978 nv-04-4 April 1978 nv-04-5 May 1978 nv-04-6 June 1978 nv-04-7 July 1978 nv-05-1 August 1978 nv-05-2 September 1978 nv-05-3 October 1978 nv-05-4 November 1978 nv-05-5 December 1978 | 1979 nv-05-6 January 1979 nv-05-7 February 1979 nv-05-8 March 1979 nv-05-9 April 1979 nv-05-10 May 1979 nv-05-11 June 1979 nv-05-12 July 1979 nv-06-1 August 1979 nv-06-2 September 1979 nv-06-3 October 1979 nv-06-4 November 1979 | 1980 nv-06-5 December/January 1980 nv-06-6 February 1980 nv-06-7 March 1980 nv-06-8 April 1980 nv-06-9 May 1980 nv-06-10 June 1980 nv-06-11 July 1980 nv-06-12 August 1980 nv-07-1 September 1980 nv-07-2 October 1980 nv-07-3 November 1980 |
| 1981 nv-07-4 December/January 1981 nv-07-5 February 1981 nv-07-6 March 1981 nv-07-7 April 1981 nv-07-8 May 1981 nv-07-9 June 1981 nv-07-10 July 1981 nv-08-1 August 1981 nv-08-2 September 1981 nv-08-3 October 1981 nv-08-4 November 1981 | 1982 nv-08-5 December/January 1982 nv-08-6 February 1982 nv-08-7 March 1982 nv-08-8 April 1982 nv-08-9 May 1982 nv-08-10 June 1982 nv-09-1 July/August 1982 nv-09-2 September 1982 nv-09-3 October 1982 nv-09-4 November 1982 | 1983 nv-09-5 December/January 1983 nv-09-6 February 1983 nv-09-7 March 1983 nv-09-8 April 1983 nv-09-9 May 1983 nv-09-10 June 1983 nv-10-1 July 1983 nv-10-2 August 1983 nv-10-3 September 1983 nv-10-4 October 1983 nv-10-5 November 1983 |
| 1984 nv-10-6 December/January 1984 nv-10-7 February 1984 nv-10-8 March 1984 nv-10-9 April 1984 nv-10-10 May 1984 nv-10-11 June 1984 nv-11-1 July/August 1984 nv-11-2 September 1984 nv-11-3 October 1984 nv-11-4 November 1984 | 1985 nv-11-5 December/January 1985 nv-11-6 February 1985 nv-11-7 March 1985 nv-11-8 April 1985 nv-11-9 May 1985 nv-11-10 June 1985 nv-12-1 July/August 1985 nv-12-2 September 1985 nv-12-3 October 1985 nv-12-4 November 1985 | 1986 nv-12-5 December/January 1986 nv-12-6 February 1986 nv-12-7 March 1986 nv-12-8 April 1986 nv-12-9 May 1986 nv-12-10 June 1986 nv-13-1 July/August 1986 nv-13-2 September 1986 nv-13-3 October 1986 nv-13-4 November 1986 |
| 1987 nv-13-5 December/January 1987 nv-13-6 February 1987 nv-13-7 March 1987 nv-13-8 April 1987 nv-13-9 May 1987 nv-13-10 June 1987 nv-14-1 July/August 1987 nv-14-2 September 1987 nv-14-3 October 1987 nv-14-4 November 1987 | 1988 nv-14-5 December/January 1988 nv-14-6 February 1988 nv-14-7 March 1988 nv-14-8 April 1988 nv-14-9 May 1988 nv-14-10 June 1988 nv-15-1 July/August 1988 nv-15-2 September 1988 nv-15-3 October 1988 nv-15-4 November 1988 | 1989 nv-15-5 December/January 1989 nv-15-6 February 1989 nv-15-7 March 1989 nv-15-8 April 1989 nv-15-9 May 1989 nv-15-10 June 1989 nv-16-1 July/August 1989 nv-16-2 September 1989 nv-16-3 October 1989 nv-16-4 November 1989 |
| 1990 nv-16-5 December/January 1990 nv-16-6 February 1990 nv-16-7 March 1990 nv-16-8 April 1990 nv-16-9 May 1990 nv-16-10 June 1990 nv-16-11 July/August 1990 nv-17-2 September 1990 nv-17-3 October 1990 nv-17-4 November 1990 | 1991 nv-17-5 December/January 1991 nv-17-7 February 1991 nv-17-8 March 1991 nv-17-9 April 1991 nv-17-10 May 1991 nv-17-11 June 1991 nv-18-1 July/August 1991 nv-18-2 September 1991 nv-18-3 October 1991 nv-18-4 November 1991 | 1992 nv-18-5 December/January 1992 nv-18-6 February 1992 nv-18-7 March 1992 nv-18-8 April 1992 nv-18-9 May 1992 nv-18-10 June 1992 nv-19-1 July/August 1992 nv-19-2 September 1992 nv-19-3 October 1992 nv-19-4 November 1992 |
| 1993 nv-19-6 December/January 1993 nv-19-8 February 1993 nv-19-9 March 1993 nv-19-10 April 1993 nv-19-11 May 1993 nv-19-12 June 1993 nv-20-1 July/August 1993 nv-20-2 September 1993 nv-20-3 October 1993 nv-20-4 November 1993 | 1994 nv-20-5 December/January 1994 nv-20-6 February 1994 nv-20-7 March 1994 nv-20-8 April 1994 nv-20-9 May 1994 nv-20-10 June 1994 nv-21-1 July/August 1994 nv-21-2 September 1994 nv-21-3 October 1994 nv-21-4 November 1994 | 1995 nv-21-5 December/January 1995 nv-21-6 February 1995 nv-21-7 March 1995 nv-21-8 April 1995 nv-21-9 May 1995 nv-21-10 June 1995 nv-22-1 July/August 1995 nv-22-2 September 1995 nv-22-3 October 1995 nv-22-4 November 1995 |
| 1996 nv-22-5 December/January 1996 nv-22-6 February 1996 nv-22-7 March 1996 nv-22-8 April 1996 nv-22-9 May 1996 nv-22-10 June 1996 nv-23-1 July/August 1996 nv-23-2 September 1996 nv-23-3 October 1996 nv-23-4 November 1996 | 1997 nv-23-5 December/January 1997 nv-23-6 February 1997 nv-23-7 March 1997 nv-23-8 April 1997 nv-23-9 May 1997 nv-23-10 June 1997 nv-24-1 July/August 1997 nv-24-2 September 1997 nv-24-3 October 1997 nv-24-4 November 1997 | 1998 nv-24-5 December/January 1998 nv-24-6 February 1998 nv-24-7 March 1998 nv-24-8 April 1998 nv-24-9 May 1998 nv-24-10 June 1998 nv-25-1 July/August 1998 nv-25-2 September 1998 nv-25-3 October 1998 nv-25-4 November 1998 |
| 1999 nv-25-5 December/January 1999 nv-25-6 February 1999 nv-25-7 March 1999 nv-25-8 April 1999 nv-25-9 May 1999 nv-25-10 June 1999 nv-26-1 July/August 1999 nv-26-2 September 1999 nv-26-3 October 1999 nv-26-4 November 1999 | 2000 nv-26-5 December/January 2000 nv-26-6 Febuary 2000 nv-26-7 March 2000 nv-26-8 April 2000 nv-26-9 May 2000 nv-26-10 June 2000 nv-27-1 July/August 2000 nv-27-2 September/October/November 2000 | 2001 nv-27-3 December/January 2001 nv-27-4 Spring 2001 nv-27-5 May 2001 nv-27-6 June 2001 nv-28-1 July/August 2001 nv-28-2 September/October 2001 nv-28-3 November/December 2001 |
| 2002 nv-28-4 January/February 2002 nv-28-5 March/April 2002 nv-28-6 May/June 2002 nv-29-1 July/August 2002 nv-29-2 September/October 2002 nv-29-3 November/December 2002 | 2003 nv-29-4 January/February 2003 nv-29-5 March/April 2003 nv-29-6 May/June 2003 nv-29-7 July/August 2003 nv-29-8 September/October 2003 nv-29-9 November/December 2003 | 2004 nv-30-1 January/February 2004 nv-30-2 March/April 2004 nv-30-3 May/June 2004 nv-30-4 July/August 2004 nv-30-5 September/October 2004 nv-30-6 November/December 2004 |
| 2005 nv-31-1 January/February 2005 nv-31-2 March/April 2005 nv-31-3 May/June 2005 nv-32-1 July/August 2005 nv-32-2 September/October 2005 nv-32-3 November/December 2005 | 2006 nv-32-4 January/February 2006 nv-32-5 March/April 2006 nv-32-6 May/June 2006 nv-33-1 July/August 2006 nv-33-2 September/October 2006 nv-33-3 November/December 2006 | 2007 nv-33-4 January/February 2007 nv-33-5 March/April 2007 nv-33-6 May/June 2007 nv-34-1 July/August 2007 nv-34-2 September/October 2007 nv-34-3 November/December 2007 |
| 2008 nv-34-4 January/February 2008 nv-34-5 March/April 2008 nv-34-6 May/June 2008 nv-35-1 July/August 2008 nv-35-2 September/October 2008 nv-35-3 November/December 2008 | 2009 nv-35-4 January/February 2009 nv-35-5 March/April 2009 nv-35-6 May/June 2009 nv-36-1 July/August 2009 nv-36-2 September/October 2009 nv-36-3 November/December 2009 | 2010 nv-36-4 January/February 2010 nv-36-5 March/April 2010 nv-36-6 May/June 2010 nv-37-1 July/August 2010 nv-37-2 September/October 2010 nv-37-3 November/December 2010 |
| 2011 nv-37-4 January/February 2011 nv-37-5 March/April 2011 nv-37-6 May/June 2011 nv-38-1 July/August 2011 nv-38-2 September/October 2011 nv-38-3 November/December 2011 | 2012 nv-38-4 January/February 2012 nv-38-5 March/April 2012 nv-38-6 May/June 2012 nv-39-1 August/September 2012 nv-39-2 October/November 2012 | 2013 nv-39-3 December/January 2013 nv-39-4 February/March 2013 nv-39-5 April/May 2013 nv-39-6 June/July 2013 nv-40-1 August/September 2013 nv-40-2 October/November 2013 |
| 2014 nv-40-3 December/January 2014 nv-40-4 February/March 2014 nv-40-5 April/May 2014 nv-40-6 June/July 2014 nv-41-1 August/September 2014 nv-41-2 October/November 2014 | 2015 nv-41-3 December/January 2015 nv-41-4 February/March 2015 nv-41-5 April/May 2015 nv-41-6 June/July 2015 nv-41-7 August/September 2015 nv-41-8 October/November 2015 | 2016 nv-42-1 December/January 2016 nv-42-2 February/March 2016 nv-42-3 April/May 2016 nv-42-4 June/July 2016 nv-42-5 August/September 2016 nv-42-6 October/November 2016 |
| 2017 nv-43-1 December/January 2017 nv-43-2 February/March 2017 nv-43-3 April/May 2017 nv-43-4 June/July 2017 nv-43-5 August/September 2017 nv-43-6 October/November 2017 | 2018 nv-44-1 December/January 2018 nv-44-2 February/March 2018 nv-44-3 April/May 2018 nv-44-4 June/July 2018 nv-44-5 August/September 2018 nv-44-6 October/November 2018 | 2019 nv-45-1 December/January 2019 nv-45-2 February/March 2019 nv-45-3 April/May 2019 nv-45-4 June/July 2019 nv-45-5 August/September 2019 nv-45-6 October/November 2019 |
| 2020 nv-46-1 December/January 2020 nv-46-2 February/March 2020 nv-46-3 April/May 2020 nv-46-4 June/July 2020 nv-46-5 August/September 2020 nv-46-6 October/November 2020 | 2021 nv-47-1 December/January 2021 nv-47-2 February/March 2021 nv-47-3 April/May 2021 nv-47-4 June/July 2021 nv-47-5 August/September 2021 nv-47-6 October/November 2021 | 2022 nv-48-1 *December/January 2022 nv-48-2 *February/March 2022 nv-48-3 *April/May 2022 nv-48-4 *June/July 2022 nv-48-5 *August/September 2022 nv-48-6 *October/November 2022 |
| 2023 nv-49-1 *December/January 2023 nv-49-2 *February/March 2023 nv-49-3 *April/May 2023 nv-49-4 *June/July 2023 nv-49-5 *August/September 2023 nv-49-6 *October/November 2023 | 2024 nv-50-1 *December/January 2024 nv-50-2 *February/March 2024 nv-50-3 *April/May 2024 nv-50-4 *June/July 2024 nv-50-5 *August/September 2024 |