Year | Value | 2023 | 56,225 | 2022 | 56,272 | 2021 | 56,330 | 2020 | 56,373 | 2019 | 56,254 | 2018 | 55,935 | 2017 | 55,591 | 2016 | 55,224 | 2015 | 54,828 | 2014 | 54,403 | 2013 | 53,953 | 2012 | 53,480 | 2011 | 52,980 | 2010 | 52,484 | 2009 | 51,919 | 2008 | 51,272 | 2007 | 50,636 | 2006 | 50,016 | 2005 | 49,414 | 2004 | 48,877 | 2003 | 48,374 | 2002 | 47,831 | 2001 | 47,178 | 2000 | 46,269 | 1999 | 45,050 | 1998 | 43,688 | 1997 | 42,336 | 1996 | 41,014 | 1995 | 39,724 | 1994 | 38,437 | 1993 | 37,137 | 1992 | 35,941 | 1991 | 34,657 | 1990 | 33,480 | 1989 | 32,892 | 1988 | 32,788 | 1987 | 32,904 | 1986 | 33,007 | 1985 | 33,008 | 1984 | 32,886 | 1983 | 32,659 | 1982 | 32,389 | 1981 | 32,121 | 1980 | 31,909 | 1979 | 31,749 | 1978 | 31,584 | 1977 | 31,416 | 1976 | 31,245 | 1975 | 30,972 | 1974 | 30,595 |
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