| Year | Value | | 2024 | 166,596 | | 2023 | 158,229 | | 2022 | 152,257 | | 2021 | 147,816 | | 2020 | 144,079 | | 2019 | 140,599 | | 2018 | 136,992 | | 2017 | 133,457 | | 2016 | 130,538 | | 2015 | 128,652 | | 2014 | 128,051 | | 2013 | 128,706 | | 2012 | 130,269 | | 2011 | 132,586 | | 2010 | 135,569 | | 2009 | 139,163 | | 2008 | 143,261 | | 2007 | 147,436 | | 2006 | 151,538 | | 2005 | 155,186 | | 2004 | 157,760 | | 2003 | 156,217 | | 2002 | 151,348 | | 2001 | 146,682 | | 2000 | 141,587 | | 1999 | 135,929 | | 1998 | 133,622 | | 1997 | 133,814 | | 1996 | 132,639 | | 1995 | 130,669 | | 1994 | 128,201 | | 1993 | 125,550 | | 1992 | 114,779 | | 1991 | 103,668 | | 1990 | 100,421 | | 1989 | 97,712 | | 1988 | 94,943 | | 1987 | 90,752 | | 1986 | 87,149 | | 1985 | 85,221 | | 1984 | 83,435 | | 1983 | 81,751 | | 1982 | 81,614 | | 1981 | 82,086 | | 1980 | 94,119 | | 1979 | 103,855 | | 1978 | 94,996 | | 1977 | 84,671 | | 1976 | 78,907 | | 1975 | 75,812 |
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