Year | Value | 2022 | 57,387 | 2021 | 56,898 | 2020 | 56,413 | 2019 | 56,072 | 2018 | 55,865 | 2017 | 55,630 | 2016 | 55,388 | 2015 | 55,166 | 2014 | 54,957 | 2013 | 54,755 | 2012 | 54,568 | 2011 | 54,398 | 2010 | 54,246 | 2009 | 54,393 | 2008 | 54,828 | 2007 | 55,253 | 2006 | 55,656 | 2005 | 55,995 | 2004 | 56,246 | 2003 | 56,421 | 2002 | 56,495 | 2001 | 56,446 | 2000 | 56,309 | 1999 | 56,279 | 1998 | 56,334 | 1997 | 56,325 | 1996 | 56,257 | 1995 | 56,122 | 1994 | 55,407 | 1993 | 53,918 | 1992 | 52,223 | 1991 | 50,917 | 1990 | 49,988 | 1989 | 49,069 | 1988 | 48,148 | 1987 | 47,064 | 1986 | 45,827 | 1985 | 44,599 | 1984 | 43,377 | 1983 | 42,170 | 1982 | 40,991 | 1981 | 39,841 | 1980 | 38,716 | 1979 | 37,615 | 1978 | 36,545 | 1977 | 35,640 | 1976 | 34,903 | 1975 | 34,197 | 1974 | 33,425 | 1973 | 32,583 | 1972 | 31,759 | 1971 | 30,951 | 1970 | 30,099 | 1969 | 29,213 | 1968 | 28,360 | 1967 | 27,541 | 1966 | 26,737 | 1965 | 25,935 | 1964 | 25,161 | 1963 | 24,419 | 1962 | 23,625 | 1961 | 22,785 | 1960 | 21,977 |
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