| Year | Value | | 2023 | 96,497 | | 2022 | 92,035 | | 2021 | 88,696 | | 2020 | 85,541 | | 2019 | 82,472 | | 2018 | 79,499 | | 2017 | 76,573 | | 2016 | 73,736 | | 2015 | 70,914 | | 2014 | 68,073 | | 2013 | 65,426 | | 2012 | 63,001 | | 2011 | 60,603 | | 2010 | 58,321 | | 2009 | 56,124 | | 2008 | 54,000 | | 2007 | 52,024 | | 2006 | 50,135 | | 2005 | 48,287 | | 2004 | 46,494 | | 2003 | 44,736 | | 2002 | 43,070 | | 2001 | 41,563 | | 2000 | 40,179 | | 1999 | 38,874 | | 1998 | 37,640 | | 1997 | 36,438 | | 1996 | 35,249 | | 1995 | 34,081 | | 1994 | 32,947 | | 1993 | 31,808 | | 1992 | 30,657 | | 1991 | 29,539 | | 1990 | 28,451 | | 1989 | 27,359 | | 1988 | 26,299 | | 1987 | 25,286 | | 1986 | 24,266 | | 1985 | 23,239 | | 1984 | 22,235 | | 1983 | 21,270 | | 1982 | 20,322 | | 1981 | 19,368 | | 1980 | 18,406 | | 1979 | 17,433 | | 1978 | 16,628 | | 1977 | 16,096 | | 1976 | 16,394 | | 1975 | 19,192 | | 1974 | 21,145 |
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