| Year | Value | | 2024 | 167,139 | | 2023 | 158,640 | | 2022 | 153,321 | | 2021 | 150,545 | | 2020 | 149,598 | | 2019 | 150,490 | | 2018 | 152,709 | | 2017 | 155,576 | | 2016 | 158,581 | | 2015 | 161,284 | | 2014 | 163,312 | | 2013 | 164,398 | | 2012 | 164,398 | | 2011 | 163,864 | | 2010 | 163,089 | | 2009 | 161,610 | | 2008 | 156,393 | | 2007 | 148,413 | | 2006 | 141,725 | | 2005 | 135,082 | | 2004 | 127,872 | | 2003 | 124,810 | | 2002 | 125,404 | | 2001 | 125,188 | | 2000 | 123,849 | | 1999 | 121,638 | | 1998 | 119,087 | | 1997 | 116,546 | | 1996 | 114,632 | | 1995 | 113,541 | | 1994 | 113,024 | | 1993 | 113,200 | | 1992 | 106,964 | | 1991 | 99,617 | | 1990 | 97,930 | | 1989 | 96,389 | | 1988 | 94,487 | | 1987 | 90,807 | | 1986 | 86,924 | | 1985 | 83,890 | | 1984 | 80,461 | | 1983 | 76,480 | | 1982 | 73,204 | | 1981 | 71,213 | | 1980 | 75,166 | | 1979 | 79,784 | | 1978 | 78,445 | | 1977 | 76,803 | | 1976 | 75,968 | | 1975 | 74,618 |
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