Year | Value | 2022 | 53,741 | 2021 | 51,788 | 2020 | 51,748 | 2019 | 52,612 | 2018 | 53,323 | 2017 | 52,961 | 2016 | 51,324 | 2015 | 49,261 | 2014 | 47,750 | 2013 | 47,591 | 2012 | 49,354 | 2011 | 51,099 | 2010 | 51,575 | 2009 | 51,683 | 2008 | 50,843 | 2007 | 48,540 | 2006 | 47,002 | 2005 | 46,467 | 2004 | 44,956 | 2003 | 43,720 | 2002 | 42,709 | 2001 | 41,184 | 2000 | 39,474 | 1999 | 37,978 | 1998 | 36,563 | 1997 | 35,186 | 1996 | 33,859 | 1995 | 32,614 | 1994 | 31,459 | 1993 | 30,377 | 1992 | 29,310 | 1991 | 28,177 | 1990 | 26,926 | 1989 | 25,564 | 1988 | 24,083 | 1987 | 22,531 | 1986 | 21,062 | 1985 | 19,776 | 1984 | 18,662 | 1983 | 17,710 | 1982 | 16,948 | 1981 | 16,327 | 1980 | 15,807 | 1979 | 15,406 | 1978 | 15,149 | 1977 | 15,002 | 1976 | 14,878 | 1975 | 14,710 | 1974 | 14,492 | 1973 | 14,203 | 1972 | 13,855 | 1971 | 13,586 | 1970 | 13,496 | 1969 | 13,562 | 1968 | 13,784 | 1967 | 14,125 | 1966 | 14,445 | 1965 | 14,685 | 1964 | 14,860 | 1963 | 14,978 | 1962 | 15,028 | 1961 | 15,023 | 1960 | 14,968 |
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