Year | Value | 2022 | 52,470 | 2021 | 51,434 | 2020 | 50,273 | 2019 | 49,099 | 2018 | 47,683 | 2017 | 46,357 | 2016 | 45,940 | 2015 | 46,482 | 2014 | 47,699 | 2013 | 49,234 | 2012 | 50,828 | 2011 | 52,138 | 2010 | 52,887 | 2009 | 53,072 | 2008 | 52,656 | 2007 | 51,602 | 2006 | 50,193 | 2005 | 48,930 | 2004 | 48,130 | 2003 | 47,506 | 2002 | 46,628 | 2001 | 45,500 | 2000 | 44,062 | 1999 | 42,157 | 1998 | 40,127 | 1997 | 38,342 | 1996 | 36,637 | 1995 | 34,849 | 1994 | 33,054 | 1993 | 31,351 | 1992 | 29,765 | 1991 | 28,306 | 1990 | 26,982 | 1989 | 25,776 | 1988 | 24,732 | 1987 | 23,857 | 1986 | 23,119 | 1985 | 22,559 | 1984 | 22,229 | 1983 | 22,075 | 1982 | 21,995 | 1981 | 21,953 | 1980 | 21,905 | 1979 | 21,812 | 1978 | 21,695 | 1977 | 21,603 | 1976 | 21,546 | 1975 | 21,486 | 1974 | 21,367 | 1973 | 21,180 | 1972 | 20,970 | 1971 | 20,744 | 1970 | 20,524 | 1969 | 20,346 | 1968 | 20,163 | 1967 | 19,940 | 1966 | 19,688 | 1965 | 19,424 | 1964 | 19,183 | 1963 | 18,984 | 1962 | 18,807 | 1961 | 18,615 | 1960 | 18,346 |
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