Year | Value | 2022 | 35,427 | 2021 | 32,364 | 2020 | 28,321 | 2019 | 23,694 | 2018 | 19,375 | 2017 | 16,513 | 2016 | 15,817 | 2015 | 17,705 | 2014 | 21,679 | 2013 | 26,265 | 2012 | 29,844 | 2011 | 31,893 | 2010 | 32,624 | 2009 | 32,207 | 2008 | 31,151 | 2007 | 30,093 | 2006 | 29,320 | 2005 | 29,293 | 2004 | 30,342 | 2003 | 32,011 | 2002 | 33,584 | 2001 | 34,481 | 2000 | 34,247 | 1999 | 32,635 | 1998 | 29,829 | 1997 | 26,480 | 1996 | 23,385 | 1995 | 20,869 | 1994 | 18,921 | 1993 | 17,581 | 1992 | 16,644 | 1991 | 15,833 | 1990 | 15,334 | 1989 | 15,295 | 1988 | 15,765 | 1987 | 16,702 | 1986 | 17,626 | 1985 | 18,151 | 1984 | 18,174 | 1983 | 17,864 | 1982 | 17,387 | 1981 | 16,924 | 1980 | 16,692 | 1979 | 16,635 | 1978 | 16,702 | 1977 | 16,901 | 1976 | 17,044 | 1975 | 17,046 | 1974 | 16,957 | 1973 | 16,800 | 1972 | 16,620 | 1971 | 16,467 | 1970 | 16,423 | 1969 | 16,443 | 1968 | 16,430 | 1967 | 16,454 | 1966 | 16,626 | 1965 | 16,977 | 1964 | 17,554 | 1963 | 18,358 | 1962 | 19,324 | 1961 | 20,194 | 1960 | 20,666 |
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