| Year | Value | | 2024 | 52,142 | | 2023 | 46,389 | | 2022 | 42,448 | | 2021 | 38,959 | | 2020 | 43,492 | | 2019 | 37,969 | | 2018 | 35,029 | | 2017 | 34,001 | | 2016 | 33,320 | | 2015 | 33,426 | | 2014 | 32,345 | | 2013 | 29,393 | | 2012 | 26,814 | | 2011 | 25,481 | | 2010 | 25,765 | | 2009 | 26,576 | | 2008 | 24,573 | | 2007 | 23,673 | | 2006 | 22,917 | | 2005 | 21,346 | | 2004 | 20,021 | | 2003 | 19,107 | | 2002 | 18,739 | | 2001 | 18,435 | | 2000 | 18,035 | | 1999 | 17,423 | | 1998 | 16,509 | | 1997 | 15,318 | | 1996 | 14,405 | | 1995 | 13,900 | | 1994 | 13,438 | | 1993 | 13,008 | | 1992 | 12,597 | | 1991 | 12,191 | | 1990 | 11,795 | | 1989 | 11,414 | | 1988 | 11,031 | | 1987 | 10,618 | | 1986 | 10,173 | | 1985 | 9,870 | | 1984 | 9,705 | | 1983 | 9,503 | | 1982 | 9,238 | | 1981 | 8,901 | | 1980 | 8,506 | | 1979 | 8,079 | | 1978 | 7,639 | | 1977 | 7,185 | | 1976 | 6,710 | | 1975 | 6,206 |
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