Year | Value | 2022 | 54,172 | 2021 | 53,662 | 2020 | 53,312 | 2019 | 53,948 | 2018 | 55,819 | 2017 | 58,010 | 2016 | 60,115 | 2015 | 61,994 | 2014 | 63,320 | 2013 | 63,895 | 2012 | 64,115 | 2011 | 64,295 | 2010 | 64,484 | 2009 | 64,487 | 2008 | 64,251 | 2007 | 63,515 | 2006 | 62,286 | 2005 | 60,881 | 2004 | 59,198 | 2003 | 57,362 | 2002 | 55,462 | 2001 | 53,439 | 2000 | 51,374 | 1999 | 49,415 | 1998 | 47,544 | 1997 | 45,822 | 1996 | 44,270 | 1995 | 42,852 | 1994 | 43,986 | 1993 | 45,560 | 1992 | 44,414 | 1991 | 42,494 | 1990 | 40,527 | 1989 | 39,373 | 1988 | 37,864 | 1987 | 35,856 | 1986 | 34,508 | 1985 | 33,229 | 1984 | 32,034 | 1983 | 30,887 | 1982 | 29,794 | 1981 | 28,857 | 1980 | 28,042 | 1979 | 27,288 | 1978 | 26,626 | 1977 | 26,059 | 1976 | 25,548 | 1975 | 25,055 | 1974 | 24,527 | 1973 | 23,795 | 1972 | 22,883 | 1971 | 21,898 | 1970 | 20,809 | 1969 | 19,680 | 1968 | 18,689 | 1967 | 17,824 | 1966 | 17,044 | 1965 | 16,400 | 1964 | 15,866 | 1963 | 15,455 | 1962 | 15,136 | 1961 | 14,859 | 1960 | 14,594 |
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