Year | Value | 2022 | 32,202 | 2021 | 32,195 | 2020 | 32,391 | 2019 | 32,672 | 2018 | 33,079 | 2017 | 33,678 | 2016 | 34,499 | 2015 | 35,581 | 2014 | 36,975 | 2013 | 38,740 | 2012 | 40,933 | 2011 | 43,555 | 2010 | 46,078 | 2009 | 47,935 | 2008 | 48,949 | 2007 | 48,987 | 2006 | 48,097 | 2005 | 46,555 | 2004 | 44,767 | 2003 | 43,126 | 2002 | 41,963 | 2001 | 41,713 | 2000 | 42,011 | 1999 | 41,965 | 1998 | 41,272 | 1997 | 39,863 | 1996 | 37,834 | 1995 | 35,496 | 1994 | 33,317 | 1993 | 31,779 | 1992 | 31,497 | 1991 | 32,245 | 1990 | 33,128 | 1989 | 33,739 | 1988 | 33,882 | 1987 | 33,492 | 1986 | 32,694 | 1985 | 31,774 | 1984 | 31,050 | 1983 | 30,807 | 1982 | 31,420 | 1981 | 32,828 | 1980 | 34,339 | 1979 | 35,436 | 1978 | 35,969 | 1977 | 35,955 | 1976 | 35,552 | 1975 | 35,280 | 1974 | 35,479 | 1973 | 35,429 | 1972 | 34,750 | 1971 | 33,881 | 1970 | 33,109 | 1969 | 32,615 | 1968 | 32,446 | 1967 | 32,483 | 1966 | 32,431 | 1965 | 31,928 | 1964 | 30,782 | 1963 | 29,062 | 1962 | 27,052 | 1961 | 25,234 | 1960 | 24,174 |
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