Year | Value | 2022 | 166,171 | 2021 | 161,252 | 2020 | 156,809 | 2019 | 152,263 | 2018 | 147,275 | 2017 | 142,058 | 2016 | 138,866 | 2015 | 138,691 | 2014 | 139,021 | 2013 | 139,349 | 2012 | 141,341 | 2011 | 147,137 | 2010 | 157,446 | 2009 | 170,282 | 2008 | 181,979 | 2007 | 185,648 | 2006 | 179,262 | 2005 | 171,995 | 2004 | 169,062 | 2003 | 167,720 | 2002 | 165,901 | 2001 | 162,567 | 2000 | 158,853 | 1999 | 155,722 | 1998 | 153,617 | 1997 | 152,375 | 1996 | 151,136 | 1995 | 149,789 | 1994 | 148,996 | 1993 | 147,468 | 1992 | 143,360 | 1991 | 138,317 | 1990 | 135,693 | 1989 | 136,580 | 1988 | 139,331 | 1987 | 142,188 | 1986 | 143,064 | 1985 | 143,435 | 1984 | 143,909 | 1983 | 143,155 | 1982 | 141,976 | 1981 | 140,117 | 1980 | 137,478 | 1979 | 135,376 | 1978 | 133,722 | 1977 | 132,280 | 1976 | 130,736 | 1975 | 128,499 | 1974 | 123,762 | 1973 | 118,623 | 1972 | 114,929 | 1971 | 111,831 | 1970 | 111,260 | 1969 | 112,541 | 1968 | 111,164 | 1967 | 105,951 | 1966 | 99,102 | 1965 | 92,888 | 1964 | 88,952 | 1963 | 85,186 | 1962 | 81,185 | 1961 | 79,511 | 1960 | 81,561 |
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