Year | Value | 2022 | 344,754 | 2021 | 334,514 | 2020 | 332,376 | 2019 | 320,991 | 2018 | 312,377 | 2017 | 312,860 | 2016 | 320,273 | 2015 | 330,563 | 2014 | 342,424 | 2013 | 353,777 | 2012 | 362,185 | 2011 | 367,609 | 2010 | 371,448 | 2009 | 373,449 | 2008 | 374,410 | 2007 | 376,208 | 2006 | 377,673 | 2005 | 372,151 | 2004 | 362,426 | 2003 | 352,879 | 2002 | 336,695 | 2001 | 316,120 | 2000 | 301,427 | 1999 | 288,817 | 1998 | 271,722 | 1997 | 256,078 | 1996 | 244,414 | 1995 | 235,063 | 1994 | 229,822 | 1993 | 230,257 | 1992 | 234,848 | 1991 | 242,133 | 1990 | 251,992 | 1989 | 261,124 | 1988 | 266,950 | 1987 | 270,308 | 1986 | 272,193 | 1985 | 273,426 | 1984 | 275,045 | 1983 | 278,878 | 1982 | 284,508 | 1981 | 289,189 | 1980 | 291,851 | 1979 | 285,489 | 1978 | 262,463 | 1977 | 230,628 | 1976 | 199,844 | 1975 | 178,086 | 1974 | 177,276 | 1973 | 200,126 | 1972 | 233,279 | 1971 | 265,961 | 1970 | 294,455 | 1969 | 310,838 | 1968 | 315,988 | 1967 | 317,610 | 1966 | 317,506 | 1965 | 314,116 | 1964 | 308,231 | 1963 | 302,969 | 1962 | 298,924 | 1961 | 294,723 | 1960 | 292,526 |
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