Year | Value | 2022 | 259,764 | 2021 | 251,800 | 2020 | 250,844 | 2019 | 250,643 | 2018 | 251,009 | 2017 | 252,599 | 2016 | 256,765 | 2015 | 264,043 | 2014 | 273,901 | 2013 | 285,209 | 2012 | 296,213 | 2011 | 302,085 | 2010 | 305,466 | 2009 | 311,022 | 2008 | 315,257 | 2007 | 318,443 | 2006 | 319,963 | 2005 | 322,382 | 2004 | 325,133 | 2003 | 327,158 | 2002 | 331,032 | 2001 | 337,989 | 2000 | 345,821 | 1999 | 356,933 | 1998 | 372,732 | 1997 | 389,815 | 1996 | 407,360 | 1995 | 426,093 | 1994 | 442,092 | 1993 | 445,654 | 1992 | 437,871 | 1991 | 424,142 | 1990 | 404,479 | 1989 | 387,535 | 1988 | 379,857 | 1987 | 376,235 | 1986 | 371,086 | 1985 | 363,127 | 1984 | 353,138 | 1983 | 342,785 | 1982 | 333,178 | 1981 | 328,979 | 1980 | 332,087 | 1979 | 337,979 | 1978 | 346,328 | 1977 | 359,836 | 1976 | 379,954 | 1975 | 406,149 | 1974 | 437,661 | 1973 | 465,538 | 1972 | 480,059 | 1971 | 481,933 | 1970 | 474,672 | 1969 | 458,151 | 1968 | 440,445 | 1967 | 431,566 | 1966 | 421,963 | 1965 | 405,887 | 1964 | 394,708 | 1963 | 387,225 | 1962 | 378,987 | 1961 | 375,761 | 1960 | 377,089 |
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