Year | Value | 2022 | 328,072 | 2021 | 324,329 | 2020 | 322,482 | 2019 | 323,150 | 2018 | 325,620 | 2017 | 328,260 | 2016 | 330,196 | 2015 | 330,137 | 2014 | 327,361 | 2013 | 325,127 | 2012 | 326,527 | 2011 | 330,230 | 2010 | 335,474 | 2009 | 341,369 | 2008 | 343,723 | 2007 | 339,247 | 2006 | 329,731 | 2005 | 318,645 | 2004 | 308,100 | 2003 | 300,450 | 2002 | 296,929 | 2001 | 296,583 | 2000 | 297,605 | 1999 | 298,014 | 1998 | 298,536 | 1997 | 299,426 | 1996 | 299,440 | 1995 | 300,914 | 1994 | 305,257 | 1993 | 311,137 | 1992 | 318,661 | 1991 | 328,061 | 1990 | 336,624 | 1989 | 341,935 | 1988 | 342,627 | 1987 | 337,227 | 1986 | 324,647 | 1985 | 306,864 | 1984 | 288,512 | 1983 | 271,853 | 1982 | 257,909 | 1981 | 248,338 | 1980 | 241,930 | 1979 | 235,006 | 1978 | 228,127 | 1977 | 223,823 | 1976 | 222,066 | 1975 | 222,365 | 1974 | 224,248 | 1973 | 227,794 | 1972 | 231,770 | 1971 | 235,173 | 1970 | 238,803 | 1969 | 242,958 | 1968 | 248,309 | 1967 | 254,773 | 1966 | 262,894 | 1965 | 272,987 | 1964 | 278,419 | 1963 | 277,702 | 1962 | 276,589 | 1961 | 273,347 | 1960 | 265,760 |
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