Year | Value | 2022 | 47,538 | 2021 | 46,212 | 2020 | 44,765 | 2019 | 43,299 | 2018 | 41,724 | 2017 | 39,978 | 2016 | 38,120 | 2015 | 36,260 | 2014 | 34,484 | 2013 | 32,905 | 2012 | 31,600 | 2011 | 30,527 | 2010 | 29,574 | 2009 | 28,722 | 2008 | 28,230 | 2007 | 28,315 | 2006 | 28,902 | 2005 | 29,686 | 2004 | 30,090 | 2003 | 29,758 | 2002 | 29,002 | 2001 | 28,279 | 2000 | 27,844 | 1999 | 27,837 | 1998 | 28,201 | 1997 | 28,714 | 1996 | 29,141 | 1995 | 29,316 | 1994 | 29,167 | 1993 | 28,740 | 1992 | 28,153 | 1991 | 27,508 | 1990 | 26,743 | 1989 | 25,913 | 1988 | 25,196 | 1987 | 24,603 | 1986 | 24,107 | 1985 | 23,679 | 1984 | 23,282 | 1983 | 22,887 | 1982 | 22,491 | 1981 | 22,104 | 1980 | 21,928 | 1979 | 22,009 | 1978 | 22,207 | 1977 | 22,355 | 1976 | 22,347 | 1975 | 22,261 | 1974 | 22,030 | 1973 | 21,661 | 1972 | 21,262 | 1971 | 20,799 | 1970 | 20,214 | 1969 | 19,510 | 1968 | 18,663 | 1967 | 17,737 | 1966 | 16,921 | 1965 | 16,348 | 1964 | 15,996 | 1963 | 15,836 | 1962 | 15,825 | 1961 | 15,803 | 1960 | 15,654 |
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