Year | Value | 2022 | 26,312 | 2021 | 26,539 | 2020 | 29,090 | 2019 | 33,296 | 2018 | 38,493 | 2017 | 43,302 | 2016 | 46,574 | 2015 | 47,961 | 2014 | 47,815 | 2013 | 46,219 | 2012 | 43,686 | 2011 | 41,366 | 2010 | 39,996 | 2009 | 40,439 | 2008 | 42,336 | 2007 | 44,067 | 2006 | 45,288 | 2005 | 45,299 | 2004 | 43,553 | 2003 | 39,790 | 2002 | 34,744 | 2001 | 29,730 | 2000 | 25,433 | 1999 | 22,014 | 1998 | 19,716 | 1997 | 18,574 | 1996 | 18,291 | 1995 | 18,794 | 1994 | 20,330 | 1993 | 22,191 | 1992 | 23,841 | 1991 | 25,644 | 1990 | 27,221 | 1989 | 28,071 | 1988 | 28,010 | 1987 | 27,598 | 1986 | 27,295 | 1985 | 26,949 | 1984 | 26,571 | 1983 | 26,159 | 1982 | 25,796 | 1981 | 25,603 | 1980 | 25,437 | 1979 | 25,001 | 1978 | 24,385 | 1977 | 23,744 | 1976 | 22,941 | 1975 | 22,144 | 1974 | 21,578 | 1973 | 21,342 | 1972 | 21,524 | 1971 | 21,927 | 1970 | 22,682 | 1969 | 22,894 | 1968 | 22,184 | 1967 | 21,471 | 1966 | 20,769 | 1965 | 20,489 | 1964 | 20,751 | 1963 | 21,139 | 1962 | 21,547 | 1961 | 22,022 | 1960 | 22,562 |
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