Year | Value | 2022 | 47,104 | 2021 | 45,728 | 2020 | 44,310 | 2019 | 42,916 | 2018 | 41,432 | 2017 | 39,778 | 2016 | 38,009 | 2015 | 36,242 | 2014 | 34,627 | 2013 | 33,275 | 2012 | 32,212 | 2011 | 31,422 | 2010 | 30,713 | 2009 | 29,994 | 2008 | 29,634 | 2007 | 29,970 | 2006 | 30,922 | 2005 | 32,106 | 2004 | 32,825 | 2003 | 32,599 | 2002 | 31,700 | 2001 | 30,648 | 2000 | 29,836 | 1999 | 29,500 | 1998 | 29,553 | 1997 | 29,797 | 1996 | 30,067 | 1995 | 30,211 | 1994 | 30,164 | 1993 | 29,949 | 1992 | 29,641 | 1991 | 29,288 | 1990 | 28,295 | 1989 | 26,709 | 1988 | 25,393 | 1987 | 24,397 | 1986 | 23,571 | 1985 | 22,900 | 1984 | 22,360 | 1983 | 21,943 | 1982 | 21,647 | 1981 | 21,481 | 1980 | 21,532 | 1979 | 21,813 | 1978 | 22,235 | 1977 | 22,588 | 1976 | 22,749 | 1975 | 22,788 | 1974 | 22,577 | 1973 | 22,144 | 1972 | 21,680 | 1971 | 21,165 | 1970 | 20,551 | 1969 | 19,846 | 1968 | 19,021 | 1967 | 18,134 | 1966 | 17,360 | 1965 | 16,818 | 1964 | 16,486 | 1963 | 16,340 | 1962 | 16,338 | 1961 | 16,332 | 1960 | 16,214 |
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