Year | Value | 2023 | 32,765 | 2022 | 29,298 | 2021 | 28,556 | 2020 | 30,908 | 2019 | 34,982 | 2018 | 39,764 | 2017 | 44,580 | 2016 | 48,395 | 2015 | 50,612 | 2014 | 51,165 | 2013 | 50,469 | 2012 | 49,062 | 2011 | 47,485 | 2010 | 46,118 | 2009 | 45,004 | 2008 | 43,634 | 2007 | 42,073 | 2006 | 40,310 | 2005 | 37,679 | 2004 | 34,089 | 2003 | 30,158 | 2002 | 26,627 | 2001 | 23,727 | 2000 | 21,279 | 1999 | 19,107 | 1998 | 17,070 | 1997 | 15,338 | 1996 | 14,223 | 1995 | 13,748 | 1994 | 13,978 | 1993 | 14,874 | 1992 | 16,269 | 1991 | 17,886 | 1990 | 19,457 | 1989 | 20,614 | 1988 | 21,174 | 1987 | 21,263 | 1986 | 20,978 | 1985 | 20,420 | 1984 | 19,623 | 1983 | 18,788 | 1982 | 18,295 | 1981 | 18,328 | 1980 | 18,880 | 1979 | 19,797 | 1978 | 19,224 | 1977 | 16,956 | 1976 | 14,634 | 1975 | 13,492 | 1974 | 13,478 |
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