Year | Value | 2022 | 317,388 | 2021 | 321,094 | 2020 | 324,146 | 2019 | 321,726 | 2018 | 316,556 | 2017 | 312,022 | 2016 | 308,328 | 2015 | 305,472 | 2014 | 304,230 | 2013 | 304,581 | 2012 | 306,330 | 2011 | 308,463 | 2010 | 308,244 | 2009 | 303,940 | 2008 | 295,888 | 2007 | 283,341 | 2006 | 268,290 | 2005 | 257,254 | 2004 | 253,585 | 2003 | 256,631 | 2002 | 265,088 | 2001 | 275,159 | 2000 | 283,252 | 1999 | 289,828 | 1998 | 295,107 | 1997 | 298,764 | 1996 | 302,027 | 1995 | 304,647 | 1994 | 306,153 | 1993 | 306,487 | 1992 | 304,712 | 1991 | 299,710 | 1990 | 290,594 | 1989 | 279,219 | 1988 | 266,920 | 1987 | 253,812 | 1986 | 240,705 | 1985 | 228,327 | 1984 | 217,589 | 1983 | 209,032 | 1982 | 202,988 | 1981 | 199,848 | 1980 | 199,579 | 1979 | 202,381 | 1978 | 206,866 | 1977 | 212,453 | 1976 | 218,233 | 1975 | 222,205 | 1974 | 225,252 | 1973 | 227,122 | 1972 | 226,522 | 1971 | 223,652 | 1970 | 219,851 | 1969 | 215,347 | 1968 | 209,707 | 1967 | 203,014 | 1966 | 195,514 | 1965 | 187,532 | 1964 | 179,655 | 1963 | 171,770 | 1962 | 163,616 | 1961 | 154,949 | 1960 | 146,169 |
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