Year | Value | 2022 | 285,122 | 2021 | 288,021 | 2020 | 290,533 | 2019 | 291,879 | 2018 | 291,367 | 2017 | 289,580 | 2016 | 286,460 | 2015 | 284,137 | 2014 | 282,660 | 2013 | 280,211 | 2012 | 277,550 | 2011 | 274,614 | 2010 | 269,811 | 2009 | 263,633 | 2008 | 258,001 | 2007 | 252,085 | 2006 | 245,054 | 2005 | 238,337 | 2004 | 232,387 | 2003 | 226,720 | 2002 | 222,645 | 2001 | 221,914 | 2000 | 225,499 | 1999 | 233,918 | 1998 | 246,534 | 1997 | 261,372 | 1996 | 276,177 | 1995 | 288,422 | 1994 | 294,474 | 1993 | 293,860 | 1992 | 288,616 | 1991 | 279,825 | 1990 | 268,730 | 1989 | 256,866 | 1988 | 246,046 | 1987 | 237,677 | 1986 | 232,369 | 1985 | 229,883 | 1984 | 229,871 | 1983 | 230,779 | 1982 | 232,212 | 1981 | 234,412 | 1980 | 237,490 | 1979 | 242,741 | 1978 | 249,951 | 1977 | 257,304 | 1976 | 264,129 | 1975 | 268,589 | 1974 | 269,103 | 1973 | 269,572 | 1972 | 273,318 | 1971 | 278,382 | 1970 | 283,327 | 1969 | 288,619 | 1968 | 291,333 | 1967 | 287,808 | 1966 | 279,371 | 1965 | 268,874 | 1964 | 258,768 | 1963 | 252,281 | 1962 | 250,335 | 1961 | 250,936 | 1960 | 252,942 |
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