| Year | Value | | 2019 | 187,505 | | 2018 | 181,596 | | 2017 | 175,418 | | 2016 | 169,568 | | 2015 | 164,357 | | 2014 | 157,380 | | 2013 | 150,658 | | 2012 | 144,518 | | 2011 | 139,394 | | 2010 | 135,564 | | 2009 | 131,248 | | 2008 | 128,561 | | 2007 | 127,139 | | 2006 | 126,132 | | 2005 | 124,883 | | 2004 | 122,606 | | 2003 | 120,079 | | 2002 | 117,518 | | 2001 | 115,381 | | 2000 | 113,943 | | 1999 | 111,504 | | 1998 | 109,586 | | 1997 | 108,161 | | 1996 | 107,079 | | 1995 | 106,221 | | 1994 | 105,106 | | 1993 | 104,586 | | 1992 | 104,512 | | 1991 | 104,548 | | 1990 | 104,407 | | 1989 | 102,488 | | 1988 | 100,120 | | 1987 | 97,529 | | 1986 | 95,141 | | 1985 | 93,191 | | 1984 | 89,690 | | 1983 | 86,601 | | 1982 | 83,738 | | 1981 | 80,596 | | 1980 | 76,767 | | 1979 | 71,989 | | 1978 | 66,572 | | 1977 | 60,910 | | 1976 | 55,685 | | 1975 | 51,277 | | 1974 | 47,090 | | 1973 | 43,779 | | 1972 | 41,194 | | 1971 | 39,022 | | 1970 | 37,093 | | 1969 | 35,862 | | 1968 | 35,350 | | 1967 | 35,362 | | 1966 | 35,510 | | 1965 | 35,404 | | 1964 | 34,522 | | 1963 | 32,987 | | 1962 | 30,879 | | 1961 | 28,573 | | 1960 | 26,390 |
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