| Year | Value | | 2024 | 1,701 | | 2023 | 1,791 | | 2022 | 1,861 | | 2021 | 1,920 | | 2020 | 1,971 | | 2019 | 2,032 | | 2018 | 2,090 | | 2017 | 2,142 | | 2016 | 2,175 | | 2015 | 2,193 | | 2014 | 2,225 | | 2013 | 2,262 | | 2012 | 2,286 | | 2011 | 2,261 | | 2010 | 2,185 | | 2009 | 2,121 | | 2008 | 2,069 | | 2007 | 2,020 | | 2006 | 1,970 | | 2005 | 1,921 | | 2004 | 1,866 | | 2003 | 1,806 | | 2002 | 1,747 | | 2001 | 1,696 | | 2000 | 1,652 | | 1999 | 1,604 | | 1998 | 1,549 | | 1997 | 1,504 | | 1996 | 1,501 | | 1995 | 1,566 | | 1994 | 1,718 | | 1993 | 1,950 | | 1992 | 2,235 | | 1991 | 2,526 | | 1990 | 2,795 | | 1989 | 3,004 | | 1988 | 3,130 | | 1987 | 3,173 | | 1986 | 3,164 | | 1985 | 3,122 | | 1984 | 3,028 | | 1983 | 2,897 | | 1982 | 2,741 | | 1981 | 2,580 | | 1980 | 2,416 | | 1979 | 2,297 | | 1978 | 2,200 | | 1977 | 2,109 | | 1976 | 2,011 | | 1975 | 1,905 |
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