Year | Value | 2022 | 47,192 | 2021 | 47,573 | 2020 | 48,124 | 2019 | 48,462 | 2018 | 48,923 | 2017 | 49,525 | 2016 | 50,092 | 2015 | 50,591 | 2014 | 51,535 | 2013 | 52,520 | 2012 | 52,985 | 2011 | 53,144 | 2010 | 52,820 | 2009 | 52,014 | 2008 | 50,492 | 2007 | 48,472 | 2006 | 46,522 | 2005 | 44,480 | 2004 | 42,354 | 2003 | 40,805 | 2002 | 39,601 | 2001 | 38,350 | 2000 | 37,084 | 1999 | 35,745 | 1998 | 34,548 | 1997 | 33,487 | 1996 | 32,520 | 1995 | 31,654 | 1994 | 30,776 | 1993 | 29,809 | 1992 | 28,868 | 1991 | 28,001 | 1990 | 27,215 | 1989 | 26,468 | 1988 | 26,096 | 1987 | 26,296 | 1986 | 26,705 | 1985 | 27,116 | 1984 | 27,512 | 1983 | 27,871 | 1982 | 28,190 | 1981 | 28,493 | 1980 | 28,786 | 1979 | 29,053 | 1978 | 29,287 | 1977 | 29,509 | 1976 | 29,744 | 1975 | 29,688 | 1974 | 29,351 | 1973 | 29,082 | 1972 | 28,869 | 1971 | 28,657 | 1970 | 28,410 | 1969 | 28,127 | 1968 | 27,824 | 1967 | 27,512 | 1966 | 27,203 | 1965 | 26,902 | 1964 | 26,599 | 1963 | 26,281 | 1962 | 25,966 | 1961 | 25,690 | 1960 | 25,477 |
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