| Year | Value | | 2024 | 54,925 | | 2023 | 52,868 | | 2022 | 51,120 | | 2021 | 50,155 | | 2020 | 49,873 | | 2019 | 49,024 | | 2018 | 47,508 | | 2017 | 45,991 | | 2016 | 44,432 | | 2015 | 42,994 | | 2014 | 41,496 | | 2013 | 39,898 | | 2012 | 38,312 | | 2011 | 36,700 | | 2010 | 35,136 | | 2009 | 33,593 | | 2008 | 32,062 | | 2007 | 30,582 | | 2006 | 29,146 | | 2005 | 27,730 | | 2004 | 26,509 | | 2003 | 25,526 | | 2002 | 24,602 | | 2001 | 23,713 | | 2000 | 22,855 | | 1999 | 22,033 | | 1998 | 21,252 | | 1997 | 20,509 | | 1996 | 19,807 | | 1995 | 19,102 | | 1994 | 18,387 | | 1993 | 17,701 | | 1992 | 17,035 | | 1991 | 16,396 | | 1990 | 15,775 | | 1989 | 15,169 | | 1988 | 14,587 | | 1987 | 14,011 | | 1986 | 13,490 | | 1985 | 13,006 | | 1984 | 12,525 | | 1983 | 12,095 | | 1982 | 11,706 | | 1981 | 11,331 | | 1980 | 10,967 | | 1979 | 10,618 | | 1978 | 10,281 | | 1977 | 9,959 | | 1976 | 9,668 | | 1975 | 9,429 |
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