Year | Value | 2022 | 320,937 | 2021 | 314,566 | 2020 | 311,023 | 2019 | 308,793 | 2018 | 307,506 | 2017 | 307,961 | 2016 | 308,917 | 2015 | 308,492 | 2014 | 307,919 | 2013 | 309,489 | 2012 | 312,662 | 2011 | 316,231 | 2010 | 317,783 | 2009 | 319,648 | 2008 | 319,674 | 2007 | 316,755 | 2006 | 311,903 | 2005 | 306,436 | 2004 | 301,810 | 2003 | 298,710 | 2002 | 297,160 | 2001 | 297,544 | 2000 | 299,796 | 1999 | 302,426 | 1998 | 304,040 | 1997 | 304,505 | 1996 | 303,248 | 1995 | 300,897 | 1994 | 299,541 | 1993 | 300,788 | 1992 | 305,127 | 1991 | 312,775 | 1990 | 322,511 | 1989 | 331,845 | 1988 | 338,556 | 1987 | 343,463 | 1986 | 348,456 | 1985 | 354,560 | 1984 | 363,213 | 1983 | 373,256 | 1982 | 381,483 | 1981 | 387,665 | 1980 | 391,202 | 1979 | 391,555 | 1978 | 390,606 | 1977 | 389,116 | 1976 | 386,163 | 1975 | 382,070 | 1974 | 377,057 | 1973 | 371,034 | 1972 | 365,522 | 1971 | 359,942 | 1970 | 355,550 | 1969 | 352,445 | 1968 | 350,453 | 1967 | 349,781 | 1966 | 350,114 | 1965 | 346,142 | 1964 | 336,171 | 1963 | 323,984 | 1962 | 307,203 | 1961 | 286,261 | 1960 | 270,906 |
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