Year | Value | 2023 | 30,266 | 2022 | 28,980 | 2021 | 28,196 | 2020 | 27,858 | 2019 | 27,813 | 2018 | 27,868 | 2017 | 27,841 | 2016 | 27,849 | 2015 | 27,662 | 2014 | 26,951 | 2013 | 25,903 | 2012 | 24,827 | 2011 | 23,858 | 2010 | 22,895 | 2009 | 21,889 | 2008 | 20,802 | 2007 | 19,638 | 2006 | 18,450 | 2005 | 17,306 | 2004 | 16,282 | 2003 | 15,649 | 2002 | 15,378 | 2001 | 15,167 | 2000 | 14,943 | 1999 | 14,706 | 1998 | 14,697 | 1997 | 14,949 | 1996 | 15,231 | 1995 | 15,483 | 1994 | 15,633 | 1993 | 15,654 | 1992 | 15,553 | 1991 | 15,148 | 1990 | 14,459 | 1989 | 13,729 | 1988 | 13,021 | 1987 | 12,355 | 1986 | 11,753 | 1985 | 11,212 | 1984 | 10,695 | 1983 | 10,171 | 1982 | 9,628 | 1981 | 9,049 | 1980 | 8,450 | 1979 | 7,796 | 1978 | 7,115 | 1977 | 6,562 | 1976 | 6,205 | 1975 | 6,016 |
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