Year | Value | 2023 | 43,120 | 2022 | 40,816 | 2021 | 38,785 | 2020 | 38,248 | 2019 | 38,195 | 2018 | 37,461 | 2017 | 36,876 | 2016 | 36,655 | 2015 | 36,319 | 2014 | 35,325 | 2013 | 34,422 | 2012 | 34,608 | 2011 | 35,157 | 2010 | 35,495 | 2009 | 35,671 | 2008 | 35,760 | 2007 | 35,761 | 2006 | 35,249 | 2005 | 33,790 | 2004 | 31,258 | 2003 | 28,920 | 2002 | 28,350 | 2001 | 28,809 | 2000 | 29,050 | 1999 | 28,852 | 1998 | 28,192 | 1997 | 27,170 | 1996 | 25,980 | 1995 | 24,760 | 1994 | 23,458 | 1993 | 22,033 | 1992 | 20,545 | 1991 | 19,151 | 1990 | 18,645 | 1989 | 18,920 | 1988 | 19,125 | 1987 | 19,221 | 1986 | 19,217 | 1985 | 19,118 | 1984 | 18,933 | 1983 | 18,642 | 1982 | 18,205 | 1981 | 17,689 | 1980 | 17,317 | 1979 | 17,027 | 1978 | 16,617 | 1977 | 16,089 | 1976 | 15,451 | 1975 | 14,715 | 1974 | 13,888 |
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