Year | Value | 2022 | 47,028 | 2021 | 46,437 | 2020 | 46,454 | 2019 | 46,231 | 2018 | 45,606 | 2017 | 44,363 | 2016 | 42,953 | 2015 | 42,056 | 2014 | 41,636 | 2013 | 41,628 | 2012 | 42,308 | 2011 | 43,520 | 2010 | 44,750 | 2009 | 45,681 | 2008 | 46,244 | 2007 | 46,560 | 2006 | 46,573 | 2005 | 46,597 | 2004 | 46,618 | 2003 | 46,409 | 2002 | 46,276 | 2001 | 46,386 | 2000 | 46,222 | 1999 | 45,494 | 1998 | 45,170 | 1997 | 45,274 | 1996 | 45,022 | 1995 | 44,068 | 1994 | 42,181 | 1993 | 40,098 | 1992 | 39,003 | 1991 | 39,725 | 1990 | 41,751 | 1989 | 44,572 | 1988 | 47,851 | 1987 | 50,358 | 1986 | 50,720 | 1985 | 50,093 | 1984 | 49,219 | 1983 | 47,658 | 1982 | 46,551 | 1981 | 46,313 | 1980 | 46,834 | 1979 | 47,906 | 1978 | 49,135 | 1977 | 49,848 | 1976 | 49,266 | 1975 | 47,197 | 1974 | 44,502 | 1973 | 41,722 | 1972 | 38,408 | 1971 | 35,362 | 1970 | 33,131 | 1969 | 31,000 | 1968 | 29,095 | 1967 | 27,134 | 1966 | 25,270 | 1965 | 24,504 | 1964 | 25,015 | 1963 | 25,940 | 1962 | 27,527 | 1961 | 29,573 | 1960 | 31,011 |
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