Year | Value | 2023 | 34,559 | 2022 | 36,620 | 2021 | 38,837 | 2020 | 40,891 | 2019 | 41,134 | 2018 | 39,868 | 2017 | 38,291 | 2016 | 36,649 | 2015 | 35,066 | 2014 | 33,543 | 2013 | 32,099 | 2012 | 30,647 | 2011 | 28,996 | 2010 | 27,107 | 2009 | 25,075 | 2008 | 22,563 | 2007 | 19,960 | 2006 | 17,773 | 2005 | 15,766 | 2004 | 13,992 | 2003 | 12,821 | 2002 | 12,244 | 2001 | 11,918 | 2000 | 11,739 | 1999 | 11,829 | 1998 | 12,241 | 1997 | 12,837 | 1996 | 13,514 | 1995 | 14,112 | 1994 | 14,510 | 1993 | 14,853 | 1992 | 15,214 | 1991 | 15,429 | 1990 | 15,442 | 1989 | 15,215 | 1988 | 14,934 | 1987 | 14,893 | 1986 | 15,046 | 1985 | 15,210 | 1984 | 15,423 | 1983 | 15,746 | 1982 | 16,120 | 1981 | 16,285 | 1980 | 15,964 | 1979 | 15,459 | 1978 | 14,025 | 1977 | 11,826 | 1976 | 9,991 | 1975 | 9,031 | 1974 | 8,816 |
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