Year | Value | 2022 | 55,520 | 2021 | 54,924 | 2020 | 54,310 | 2019 | 54,540 | 2018 | 55,867 | 2017 | 57,473 | 2016 | 58,999 | 2015 | 60,285 | 2014 | 60,952 | 2013 | 60,809 | 2012 | 60,276 | 2011 | 59,710 | 2010 | 59,202 | 2009 | 58,572 | 2008 | 57,793 | 2007 | 57,032 | 2006 | 56,266 | 2005 | 55,344 | 2004 | 54,145 | 2003 | 52,809 | 2002 | 51,448 | 2001 | 49,982 | 2000 | 48,467 | 1999 | 47,039 | 1998 | 45,628 | 1997 | 44,626 | 1996 | 43,471 | 1995 | 41,767 | 1994 | 42,389 | 1993 | 43,354 | 1992 | 41,682 | 1991 | 39,197 | 1990 | 36,593 | 1989 | 34,712 | 1988 | 32,496 | 1987 | 29,839 | 1986 | 27,867 | 1985 | 25,983 | 1984 | 24,472 | 1983 | 23,349 | 1982 | 22,353 | 1981 | 21,796 | 1980 | 21,336 | 1979 | 20,693 | 1978 | 20,188 | 1977 | 19,856 | 1976 | 19,737 | 1975 | 19,776 | 1974 | 19,848 | 1973 | 19,686 | 1972 | 19,295 | 1971 | 18,822 | 1970 | 18,211 | 1969 | 17,493 | 1968 | 16,897 | 1967 | 16,359 | 1966 | 15,696 | 1965 | 15,046 | 1964 | 14,523 | 1963 | 14,158 | 1962 | 13,904 | 1961 | 13,693 | 1960 | 13,489 |
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