Year | Value | 2022 | 49,958 | 2021 | 50,263 | 2020 | 49,749 | 2019 | 48,697 | 2018 | 47,267 | 2017 | 45,771 | 2016 | 44,460 | 2015 | 43,614 | 2014 | 43,285 | 2013 | 43,444 | 2012 | 44,146 | 2011 | 45,364 | 2010 | 46,888 | 2009 | 48,378 | 2008 | 49,701 | 2007 | 50,582 | 2006 | 50,789 | 2005 | 50,400 | 2004 | 49,555 | 2003 | 48,478 | 2002 | 47,411 | 2001 | 46,572 | 2000 | 45,653 | 1999 | 44,473 | 1998 | 43,170 | 1997 | 42,053 | 1996 | 40,967 | 1995 | 40,130 | 1994 | 39,296 | 1993 | 37,829 | 1992 | 35,910 | 1991 | 33,442 | 1990 | 30,839 | 1989 | 28,673 | 1988 | 26,900 | 1987 | 25,302 | 1986 | 23,930 | 1985 | 22,867 | 1984 | 21,943 | 1983 | 21,210 | 1982 | 20,945 | 1981 | 20,925 | 1980 | 20,937 | 1979 | 20,921 | 1978 | 20,829 | 1977 | 20,643 | 1976 | 20,208 | 1975 | 19,720 | 1974 | 19,350 | 1973 | 19,264 | 1972 | 19,530 | 1971 | 20,070 | 1970 | 20,712 | 1969 | 21,238 | 1968 | 21,474 | 1967 | 21,360 | 1966 | 20,905 | 1965 | 20,157 | 1964 | 19,217 | 1963 | 18,217 | 1962 | 17,296 | 1961 | 16,587 | 1960 | 16,474 |
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