Year | Value | 2022 | 56,354 | 2021 | 56,273 | 2020 | 56,157 | 2019 | 56,113 | 2018 | 56,170 | 2017 | 56,255 | 2016 | 56,353 | 2015 | 56,464 | 2014 | 56,604 | 2013 | 56,738 | 2012 | 56,834 | 2011 | 56,875 | 2010 | 56,816 | 2009 | 56,658 | 2008 | 56,447 | 2007 | 56,236 | 2006 | 56,016 | 2005 | 55,413 | 2004 | 54,336 | 2003 | 53,269 | 2002 | 52,213 | 2001 | 51,174 | 2000 | 50,668 | 1999 | 51,029 | 1998 | 51,365 | 1997 | 51,637 | 1996 | 51,864 | 1995 | 51,815 | 1994 | 51,270 | 1993 | 50,747 | 1992 | 50,203 | 1991 | 49,589 | 1990 | 48,840 | 1989 | 47,957 | 1988 | 47,018 | 1987 | 46,083 | 1986 | 45,173 | 1985 | 44,333 | 1984 | 43,591 | 1983 | 42,941 | 1982 | 42,332 | 1981 | 41,746 | 1980 | 41,180 | 1979 | 40,625 | 1978 | 40,676 | 1977 | 41,372 | 1976 | 42,059 | 1975 | 42,712 | 1974 | 43,301 | 1973 | 43,632 | 1972 | 43,719 | 1971 | 43,698 | 1970 | 43,602 | 1969 | 43,442 | 1968 | 43,375 | 1967 | 43,389 | 1966 | 43,351 | 1965 | 42,956 | 1964 | 42,236 | 1963 | 41,521 | 1962 | 40,811 | 1961 | 40,108 | 1960 | 39,422 |
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