Year | Value | 2022 | 46,072 | 2021 | 46,241 | 2020 | 46,440 | 2019 | 46,750 | 2018 | 47,713 | 2017 | 49,032 | 2016 | 49,847 | 2015 | 50,341 | 2014 | 50,365 | 2013 | 49,653 | 2012 | 48,491 | 2011 | 47,342 | 2010 | 46,465 | 2009 | 45,960 | 2008 | 46,151 | 2007 | 46,992 | 2006 | 48,437 | 2005 | 50,322 | 2004 | 52,277 | 2003 | 53,987 | 2002 | 55,104 | 2001 | 55,472 | 2000 | 54,960 | 1999 | 53,743 | 1998 | 52,034 | 1997 | 50,324 | 1996 | 48,688 | 1995 | 47,548 | 1994 | 46,974 | 1993 | 46,703 | 1992 | 47,165 | 1991 | 48,126 | 1990 | 49,770 | 1989 | 51,905 | 1988 | 53,727 | 1987 | 55,061 | 1986 | 55,707 | 1985 | 55,645 | 1984 | 55,058 | 1983 | 54,049 | 1982 | 53,047 | 1981 | 52,104 | 1980 | 51,223 | 1979 | 50,305 | 1978 | 49,434 | 1977 | 48,797 | 1976 | 47,903 | 1975 | 46,790 | 1974 | 45,289 | 1973 | 43,276 | 1972 | 40,815 | 1971 | 38,255 | 1970 | 35,884 | 1969 | 33,737 | 1968 | 31,814 | 1967 | 30,098 | 1966 | 28,527 | 1965 | 27,098 | 1964 | 25,901 | 1963 | 25,006 | 1962 | 24,330 | 1961 | 23,641 | 1960 | 23,551 |
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