Year | Value | 2022 | 56,990 | 2021 | 57,121 | 2020 | 57,173 | 2019 | 56,757 | 2018 | 56,493 | 2017 | 56,561 | 2016 | 56,846 | 2015 | 57,319 | 2014 | 58,787 | 2013 | 60,664 | 2012 | 62,080 | 2011 | 63,254 | 2010 | 63,891 | 2009 | 64,030 | 2008 | 63,929 | 2007 | 63,691 | 2006 | 63,379 | 2005 | 62,772 | 2004 | 61,743 | 2003 | 59,983 | 2002 | 57,485 | 2001 | 55,082 | 2000 | 52,617 | 1999 | 49,910 | 1998 | 47,844 | 1997 | 46,268 | 1996 | 44,543 | 1995 | 42,876 | 1994 | 41,239 | 1993 | 39,599 | 1992 | 38,101 | 1991 | 36,744 | 1990 | 35,505 | 1989 | 34,338 | 1988 | 33,621 | 1987 | 33,555 | 1986 | 33,761 | 1985 | 34,020 | 1984 | 34,306 | 1983 | 34,612 | 1982 | 34,938 | 1981 | 35,270 | 1980 | 35,596 | 1979 | 35,896 | 1978 | 36,137 | 1977 | 36,315 | 1976 | 36,454 | 1975 | 36,226 | 1974 | 35,656 | 1973 | 35,108 | 1972 | 34,595 | 1971 | 34,125 | 1970 | 33,691 | 1969 | 33,283 | 1968 | 32,934 | 1967 | 32,651 | 1966 | 32,386 | 1965 | 32,108 | 1964 | 31,826 | 1963 | 31,537 | 1962 | 31,233 | 1961 | 30,929 | 1960 | 30,628 |
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