Year | Value | 2022 | 231,700 | 2021 | 232,027 | 2020 | 232,283 | 2019 | 231,375 | 2018 | 229,115 | 2017 | 229,823 | 2016 | 231,813 | 2015 | 232,880 | 2014 | 232,080 | 2013 | 230,117 | 2012 | 228,165 | 2011 | 225,119 | 2010 | 223,991 | 2009 | 224,951 | 2008 | 229,983 | 2007 | 235,155 | 2006 | 238,628 | 2005 | 241,484 | 2004 | 243,768 | 2003 | 245,163 | 2002 | 250,354 | 2001 | 255,787 | 2000 | 262,846 | 1999 | 273,495 | 1998 | 287,264 | 1997 | 302,521 | 1996 | 316,386 | 1995 | 314,966 | 1994 | 316,681 | 1993 | 315,129 | 1992 | 313,439 | 1991 | 312,248 | 1990 | 307,744 | 1989 | 301,068 | 1988 | 289,517 | 1987 | 277,451 | 1986 | 266,838 | 1985 | 258,722 | 1984 | 254,229 | 1983 | 249,917 | 1982 | 241,712 | 1981 | 229,208 | 1980 | 207,059 | 1979 | 180,727 | 1978 | 153,786 | 1977 | 137,642 | 1976 | 127,023 | 1975 | 121,979 | 1974 | 119,551 | 1973 | 117,026 | 1972 | 115,963 | 1971 | 116,600 | 1970 | 118,382 | 1969 | 121,271 | 1968 | 125,779 | 1967 | 130,139 | 1966 | 134,069 | 1965 | 140,769 | 1964 | 144,228 | 1963 | 146,045 | 1962 | 144,403 | 1961 | 140,430 | 1960 | 138,972 |
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