| Year | Value | | 2024 | 68,697 | | 2023 | 65,171 | | 2022 | 62,400 | | 2021 | 61,459 | | 2020 | 60,988 | | 2019 | 59,100 | | 2018 | 56,566 | | 2017 | 53,997 | | 2016 | 51,632 | | 2015 | 49,677 | | 2014 | 47,551 | | 2013 | 45,205 | | 2012 | 43,019 | | 2011 | 40,673 | | 2010 | 38,579 | | 2009 | 36,862 | | 2008 | 34,948 | | 2007 | 33,576 | | 2006 | 32,364 | | 2005 | 30,530 | | 2004 | 28,955 | | 2003 | 27,453 | | 2002 | 25,396 | | 2001 | 23,709 | | 2000 | 23,137 | | 1999 | 22,497 | | 1998 | 21,370 | | 1997 | 20,303 | | 1996 | 19,255 | | 1995 | 18,206 | | 1994 | 17,045 | | 1993 | 15,403 | | 1992 | 13,504 | | 1991 | 12,338 | | 1990 | 12,037 | | 1989 | 11,736 | | 1988 | 11,242 | | 1987 | 11,039 | | 1986 | 11,073 | | 1985 | 11,271 | | 1984 | 11,460 | | 1983 | 11,501 | | 1982 | 11,782 | | 1981 | 12,943 | | 1980 | 14,329 | | 1979 | 14,917 | | 1978 | 14,881 | | 1977 | 14,505 | | 1976 | 14,072 | | 1975 | 13,630 |
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