Year | Value | 2022 | 338,520 | 2021 | 328,994 | 2020 | 318,312 | 2019 | 307,525 | 2018 | 298,771 | 2017 | 293,761 | 2016 | 291,461 | 2015 | 290,613 | 2014 | 289,590 | 2013 | 288,773 | 2012 | 288,456 | 2011 | 287,445 | 2010 | 287,918 | 2009 | 291,520 | 2008 | 296,757 | 2007 | 303,085 | 2006 | 311,052 | 2005 | 318,930 | 2004 | 324,414 | 2003 | 325,228 | 2002 | 319,887 | 2001 | 307,697 | 2000 | 290,509 | 1999 | 272,872 | 1998 | 256,885 | 1997 | 243,399 | 1996 | 234,059 | 1995 | 227,734 | 1994 | 220,421 | 1993 | 212,900 | 1992 | 208,335 | 1991 | 206,436 | 1990 | 206,170 | 1989 | 207,007 | 1988 | 209,225 | 1987 | 211,757 | 1986 | 214,020 | 1985 | 217,449 | 1984 | 222,130 | 1983 | 227,487 | 1982 | 233,322 | 1981 | 240,973 | 1980 | 250,833 | 1979 | 256,422 | 1978 | 256,029 | 1977 | 254,833 | 1976 | 251,665 | 1975 | 244,422 | 1974 | 241,173 | 1973 | 244,605 | 1972 | 248,564 | 1971 | 251,887 | 1970 | 254,184 | 1969 | 255,359 | 1968 | 255,483 | 1967 | 254,308 | 1966 | 251,829 | 1965 | 247,771 | 1964 | 242,211 | 1963 | 236,522 | 1962 | 231,785 | 1961 | 227,774 | 1960 | 224,432 |
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