Year | Value | 2022 | 45,986 | 2021 | 47,861 | 2020 | 50,137 | 2019 | 51,667 | 2018 | 52,075 | 2017 | 52,013 | 2016 | 51,339 | 2015 | 50,356 | 2014 | 48,508 | 2013 | 45,964 | 2012 | 44,739 | 2011 | 44,678 | 2010 | 44,215 | 2009 | 43,877 | 2008 | 43,279 | 2007 | 41,458 | 2006 | 39,029 | 2005 | 36,518 | 2004 | 34,128 | 2003 | 32,870 | 2002 | 33,378 | 2001 | 34,374 | 2000 | 34,928 | 1999 | 35,139 | 1998 | 35,092 | 1997 | 34,860 | 1996 | 34,508 | 1995 | 34,137 | 1994 | 33,860 | 1993 | 33,732 | 1992 | 33,805 | 1991 | 34,118 | 1990 | 34,158 | 1989 | 33,607 | 1988 | 32,691 | 1987 | 31,458 | 1986 | 29,933 | 1985 | 28,317 | 1984 | 26,963 | 1983 | 26,036 | 1982 | 25,536 | 1981 | 25,376 | 1980 | 25,204 | 1979 | 24,787 | 1978 | 24,162 | 1977 | 23,315 | 1976 | 22,265 | 1975 | 21,126 | 1974 | 20,099 | 1973 | 19,317 | 1972 | 18,801 | 1971 | 18,516 | 1970 | 18,400 | 1969 | 18,306 | 1968 | 18,146 | 1967 | 17,914 | 1966 | 17,647 | 1965 | 17,399 | 1964 | 17,180 | 1963 | 16,896 | 1962 | 16,471 | 1961 | 15,868 | 1960 | 15,078 |
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