| Year | Value | | 2024 | 166,479 | | 2023 | 161,484 | | 2022 | 158,708 | | 2021 | 158,388 | | 2020 | 157,891 | | 2019 | 154,571 | | 2018 | 148,700 | | 2017 | 141,780 | | 2016 | 134,905 | | 2015 | 128,941 | | 2014 | 123,001 | | 2013 | 117,388 | | 2012 | 112,922 | | 2011 | 108,304 | | 2010 | 104,312 | | 2009 | 101,235 | | 2008 | 97,419 | | 2007 | 94,821 | | 2006 | 92,535 | | 2005 | 88,576 | | 2004 | 85,381 | | 2003 | 82,207 | | 2002 | 77,153 | | 2001 | 73,081 | | 2000 | 72,409 | | 1999 | 71,425 | | 1998 | 68,709 | | 1997 | 66,041 | | 1996 | 63,369 | | 1995 | 60,618 | | 1994 | 57,415 | | 1993 | 52,495 | | 1992 | 46,446 | | 1991 | 42,692 | | 1990 | 41,904 | | 1989 | 41,180 | | 1988 | 39,856 | | 1987 | 39,442 | | 1986 | 39,779 | | 1985 | 40,340 | | 1984 | 40,341 | | 1983 | 40,030 | | 1982 | 40,805 | | 1981 | 44,786 | | 1980 | 49,764 | | 1979 | 51,961 | | 1978 | 52,067 | | 1977 | 51,164 | | 1976 | 50,141 | | 1975 | 49,074 |
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