Year | Value | 2022 | 46,631 | 2021 | 48,683 | 2020 | 50,964 | 2019 | 52,759 | 2018 | 53,670 | 2017 | 53,589 | 2016 | 52,482 | 2015 | 50,984 | 2014 | 50,005 | 2013 | 50,252 | 2012 | 51,436 | 2011 | 52,899 | 2010 | 54,390 | 2009 | 55,076 | 2008 | 54,594 | 2007 | 53,288 | 2006 | 51,834 | 2005 | 50,969 | 2004 | 50,755 | 2003 | 50,283 | 2002 | 49,613 | 2001 | 49,690 | 2000 | 50,464 | 1999 | 52,134 | 1998 | 55,230 | 1997 | 59,934 | 1996 | 65,801 | 1995 | 72,308 | 1994 | 78,986 | 1993 | 85,738 | 1992 | 92,558 | 1991 | 98,065 | 1990 | 101,267 | 1989 | 103,133 | 1988 | 103,710 | 1987 | 102,234 | 1986 | 99,455 | 1985 | 96,728 | 1984 | 93,986 | 1983 | 90,803 | 1982 | 88,233 | 1981 | 86,937 | 1980 | 86,474 | 1979 | 86,528 | 1978 | 86,779 | 1977 | 87,086 | 1976 | 87,525 | 1975 | 87,696 | 1974 | 87,249 | 1973 | 86,409 | 1972 | 85,253 | 1971 | 83,672 | 1970 | 82,070 | 1969 | 81,219 | 1968 | 81,403 | 1967 | 82,396 | 1966 | 84,305 | 1965 | 86,615 | 1964 | 88,144 | 1963 | 88,595 | 1962 | 88,076 | 1961 | 86,558 | 1960 | 84,640 |
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