Year | Value | 2022 | 37,154 | 2021 | 33,955 | 2020 | 30,660 | 2019 | 27,412 | 2018 | 24,521 | 2017 | 22,515 | 2016 | 21,775 | 2015 | 22,333 | 2014 | 23,929 | 2013 | 25,940 | 2012 | 27,602 | 2011 | 28,468 | 2010 | 28,488 | 2009 | 27,853 | 2008 | 26,843 | 2007 | 25,783 | 2006 | 24,982 | 2005 | 24,608 | 2004 | 24,640 | 2003 | 24,934 | 2002 | 25,184 | 2001 | 25,038 | 2000 | 24,357 | 1999 | 23,108 | 1998 | 21,345 | 1997 | 19,360 | 1996 | 17,419 | 1995 | 15,631 | 1994 | 14,141 | 1993 | 13,001 | 1992 | 12,129 | 1991 | 11,515 | 1990 | 11,195 | 1989 | 11,155 | 1988 | 11,477 | 1987 | 12,149 | 1986 | 12,928 | 1985 | 13,581 | 1984 | 14,001 | 1983 | 14,146 | 1982 | 14,053 | 1981 | 13,910 | 1980 | 13,845 | 1979 | 13,833 | 1978 | 13,861 | 1977 | 13,918 | 1976 | 13,893 | 1975 | 13,711 | 1974 | 13,371 | 1973 | 12,878 | 1972 | 12,280 | 1971 | 11,700 | 1970 | 11,232 | 1969 | 10,872 | 1968 | 10,600 | 1967 | 10,449 | 1966 | 10,440 | 1965 | 10,580 | 1964 | 10,894 | 1963 | 11,429 | 1962 | 12,094 | 1961 | 12,673 | 1960 | 13,006 |
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