Year | Value | 2022 | 306,707 | 2021 | 302,820 | 2020 | 299,911 | 2019 | 297,557 | 2018 | 295,817 | 2017 | 295,324 | 2016 | 295,168 | 2015 | 292,844 | 2014 | 287,460 | 2013 | 280,639 | 2012 | 273,495 | 2011 | 266,686 | 2010 | 263,079 | 2009 | 264,706 | 2008 | 269,387 | 2007 | 275,810 | 2006 | 284,536 | 2005 | 293,340 | 2004 | 302,332 | 2003 | 313,011 | 2002 | 323,043 | 2001 | 330,690 | 2000 | 337,431 | 1999 | 342,479 | 1998 | 345,230 | 1997 | 346,562 | 1996 | 345,952 | 1995 | 343,315 | 1994 | 338,025 | 1993 | 329,180 | 1992 | 317,780 | 1991 | 306,176 | 1990 | 295,008 | 1989 | 284,140 | 1988 | 274,643 | 1987 | 266,452 | 1986 | 258,076 | 1985 | 252,025 | 1984 | 250,229 | 1983 | 251,950 | 1982 | 256,987 | 1981 | 258,388 | 1980 | 250,998 | 1979 | 245,281 | 1978 | 243,700 | 1977 | 239,573 | 1976 | 243,132 | 1975 | 261,943 | 1974 | 279,903 | 1973 | 280,817 | 1972 | 270,075 | 1971 | 253,391 | 1970 | 230,905 | 1969 | 208,052 | 1968 | 196,561 | 1967 | 197,700 | 1966 | 201,843 | 1965 | 207,603 | 1964 | 214,023 | 1963 | 219,800 | 1962 | 224,718 | 1961 | 230,177 | 1960 | 238,038 |
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