Year | Value | 2022 | 45,223 | 2021 | 44,823 | 2020 | 45,100 | 2019 | 45,297 | 2018 | 45,167 | 2017 | 44,676 | 2016 | 43,898 | 2015 | 43,310 | 2014 | 43,111 | 2013 | 43,401 | 2012 | 44,283 | 2011 | 45,809 | 2010 | 47,519 | 2009 | 48,860 | 2008 | 49,878 | 2007 | 50,655 | 2006 | 50,984 | 2005 | 51,213 | 2004 | 51,475 | 2003 | 51,474 | 2002 | 51,481 | 2001 | 51,675 | 2000 | 51,532 | 1999 | 50,824 | 1998 | 50,604 | 1997 | 50,771 | 1996 | 50,493 | 1995 | 49,401 | 1994 | 47,176 | 1993 | 44,649 | 1992 | 43,216 | 1991 | 43,929 | 1990 | 46,075 | 1989 | 49,048 | 1988 | 52,695 | 1987 | 55,741 | 1986 | 56,462 | 1985 | 55,891 | 1984 | 54,968 | 1983 | 53,369 | 1982 | 52,322 | 1981 | 52,041 | 1980 | 52,549 | 1979 | 53,746 | 1978 | 55,346 | 1977 | 56,285 | 1976 | 56,419 | 1975 | 56,342 | 1974 | 55,995 | 1973 | 55,328 | 1972 | 54,249 | 1971 | 52,644 | 1970 | 49,930 | 1969 | 46,474 | 1968 | 43,097 | 1967 | 39,385 | 1966 | 35,973 | 1965 | 34,567 | 1964 | 35,384 | 1963 | 37,020 | 1962 | 39,526 | 1961 | 42,454 | 1960 | 44,663 |
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