| Year | Value | | 2024 | 57,368 | | 2023 | 55,969 | | 2022 | 54,482 | | 2021 | 52,992 | | 2020 | 51,707 | | 2019 | 50,678 | | 2018 | 49,886 | | 2017 | 49,271 | | 2016 | 48,684 | | 2015 | 47,989 | | 2014 | 47,135 | | 2013 | 46,151 | | 2012 | 45,120 | | 2011 | 44,061 | | 2010 | 42,996 | | 2009 | 41,983 | | 2008 | 41,016 | | 2007 | 40,142 | | 2006 | 39,340 | | 2005 | 38,890 | | 2004 | 38,918 | | 2003 | 39,094 | | 2002 | 38,785 | | 2001 | 37,790 | | 2000 | 36,686 | | 1999 | 35,521 | | 1998 | 34,029 | | 1997 | 32,121 | | 1996 | 30,501 | | 1995 | 29,551 | | 1994 | 29,050 | | 1993 | 28,248 | | 1992 | 28,558 | | 1991 | 28,572 | | 1990 | 26,013 | | 1989 | 23,271 | | 1988 | 21,334 | | 1987 | 19,810 | | 1986 | 18,407 | | 1985 | 17,220 | | 1984 | 16,268 | | 1983 | 15,512 | | 1982 | 14,853 | | 1981 | 14,161 | | 1980 | 13,348 | | 1979 | 12,392 | | 1978 | 11,325 | | 1977 | 10,241 | | 1976 | 9,245 | | 1975 | 8,424 |
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