Year | Value | 2023 | 50,052 | 2022 | 50,173 | 2021 | 50,207 | 2020 | 50,211 | 2019 | 50,188 | 2018 | 50,026 | 2017 | 49,847 | 2016 | 49,650 | 2015 | 49,430 | 2014 | 49,191 | 2013 | 48,927 | 2012 | 48,632 | 2011 | 48,307 | 2010 | 47,858 | 2009 | 47,292 | 2008 | 46,724 | 2007 | 46,151 | 2006 | 45,591 | 2005 | 45,069 | 2004 | 44,663 | 2003 | 44,327 | 2002 | 43,950 | 2001 | 43,513 | 2000 | 42,833 | 1999 | 41,816 | 1998 | 40,667 | 1997 | 39,522 | 1996 | 38,403 | 1995 | 37,325 | 1994 | 36,273 | 1993 | 35,223 | 1992 | 34,251 | 1991 | 33,207 | 1990 | 32,231 | 1989 | 31,703 | 1988 | 31,544 | 1987 | 31,547 | 1986 | 31,547 | 1985 | 31,471 | 1984 | 31,288 | 1983 | 31,024 | 1982 | 30,727 | 1981 | 30,492 | 1980 | 30,358 | 1979 | 30,257 | 1978 | 30,154 | 1977 | 30,049 | 1976 | 29,947 | 1975 | 29,744 | 1974 | 29,433 |
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