| Year | Value | | 2024 | 324,875 | | 2023 | 326,511 | | 2022 | 330,256 | | 2021 | 334,651 | | 2020 | 336,093 | | 2019 | 335,000 | | 2018 | 332,283 | | 2017 | 327,279 | | 2016 | 318,377 | | 2015 | 300,206 | | 2014 | 276,287 | | 2013 | 251,854 | | 2012 | 228,970 | | 2011 | 209,242 | | 2010 | 192,044 | | 2009 | 177,755 | | 2008 | 164,878 | | 2007 | 153,409 | | 2006 | 141,050 | | 2005 | 125,541 | | 2004 | 108,988 | | 2003 | 93,773 | | 2002 | 83,573 | | 2001 | 83,015 | | 2000 | 92,549 | | 1999 | 108,962 | | 1998 | 130,289 | | 1997 | 151,760 | | 1996 | 168,622 | | 1995 | 179,075 | | 1994 | 181,564 | | 1993 | 176,547 | | 1992 | 168,892 | | 1991 | 158,746 | | 1990 | 152,278 | | 1989 | 151,394 | | 1988 | 152,171 | | 1987 | 150,257 | | 1986 | 145,569 | | 1985 | 139,754 | | 1984 | 131,541 | | 1983 | 122,918 | | 1982 | 113,683 | | 1981 | 105,675 | | 1980 | 99,573 | | 1979 | 93,903 | | 1978 | 87,234 | | 1977 | 82,045 | | 1976 | 77,012 | | 1975 | 74,544 |
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