Year | Value | 2022 | 47,725 | 2021 | 48,547 | 2020 | 49,349 | 2019 | 49,964 | 2018 | 50,513 | 2017 | 51,259 | 2016 | 52,195 | 2015 | 53,100 | 2014 | 53,781 | 2013 | 54,247 | 2012 | 54,129 | 2011 | 53,049 | 2010 | 51,435 | 2009 | 49,635 | 2008 | 47,524 | 2007 | 45,946 | 2006 | 44,787 | 2005 | 44,193 | 2004 | 43,859 | 2003 | 43,663 | 2002 | 43,891 | 2001 | 44,469 | 2000 | 45,082 | 1999 | 45,789 | 1998 | 46,856 | 1997 | 48,046 | 1996 | 49,294 | 1995 | 50,756 | 1994 | 52,319 | 1993 | 54,327 | 1992 | 56,890 | 1991 | 59,233 | 1990 | 61,032 | 1989 | 62,778 | 1988 | 64,432 | 1987 | 65,812 | 1986 | 66,955 | 1985 | 68,406 | 1984 | 70,178 | 1983 | 71,558 | 1982 | 72,481 | 1981 | 73,400 | 1980 | 73,828 | 1979 | 73,154 | 1978 | 72,173 | 1977 | 71,201 | 1976 | 70,020 | 1975 | 68,540 | 1974 | 67,605 | 1973 | 67,367 | 1972 | 67,593 | 1971 | 68,525 | 1970 | 69,598 | 1969 | 70,324 | 1968 | 70,554 | 1967 | 70,057 | 1966 | 69,073 | 1965 | 68,075 | 1964 | 67,477 | 1963 | 67,213 | 1962 | 67,601 | 1961 | 68,883 | 1960 | 70,375 |
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