Year | Value | 2022 | 228,853 | 2021 | 232,083 | 2020 | 233,756 | 2019 | 233,832 | 2018 | 233,245 | 2017 | 233,610 | 2016 | 234,761 | 2015 | 237,406 | 2014 | 239,986 | 2013 | 240,723 | 2012 | 238,888 | 2011 | 236,171 | 2010 | 234,287 | 2009 | 234,397 | 2008 | 238,086 | 2007 | 245,710 | 2006 | 252,943 | 2005 | 259,924 | 2004 | 268,270 | 2003 | 273,243 | 2002 | 273,622 | 2001 | 271,865 | 2000 | 266,147 | 1999 | 254,332 | 1998 | 243,696 | 1997 | 236,943 | 1996 | 233,788 | 1995 | 233,574 | 1994 | 240,007 | 1993 | 244,517 | 1992 | 249,198 | 1991 | 254,017 | 1990 | 260,277 | 1989 | 266,303 | 1988 | 271,363 | 1987 | 275,260 | 1986 | 277,531 | 1985 | 277,688 | 1984 | 276,643 | 1983 | 273,489 | 1982 | 268,001 | 1981 | 260,120 | 1980 | 250,232 | 1979 | 239,686 | 1978 | 228,597 | 1977 | 217,849 | 1976 | 207,589 | 1975 | 196,418 | 1974 | 182,822 | 1973 | 165,290 | 1972 | 144,543 | 1971 | 123,818 | 1970 | 108,437 | 1969 | 102,483 | 1968 | 106,694 | 1967 | 119,351 | 1966 | 136,211 | 1965 | 152,408 | 1964 | 165,456 | 1963 | 173,810 | 1962 | 178,140 | 1961 | 179,889 | 1960 | 180,123 |
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