| Year | Value | | 2022 | 388,373 | | 2021 | 390,740 | | 2020 | 393,508 | | 2019 | 397,236 | | 2018 | 402,079 | | 2017 | 406,739 | | 2016 | 411,109 | | 2015 | 415,253 | | 2014 | 419,180 | | 2013 | 422,874 | | 2012 | 426,412 | | 2011 | 429,806 | | 2010 | 432,933 | | 2009 | 435,747 | | 2008 | 438,089 | | 2007 | 439,472 | | 2006 | 439,210 | | 2005 | 438,590 | | 2004 | 437,862 | | 2003 | 437,006 | | 2002 | 436,062 | | 2001 | 434,962 | | 2000 | 433,671 | | 1999 | 432,173 | | 1998 | 430,391 | | 1997 | 428,579 | | 1996 | 427,884 | | 1995 | 431,806 | | 1994 | 437,211 | | 1993 | 442,480 | | 1992 | 447,282 | | 1991 | 452,212 | | 1990 | 455,685 | | 1989 | 457,093 | | 1988 | 457,972 | | 1987 | 457,946 | | 1986 | 455,435 | | 1985 | 447,221 | | 1984 | 437,905 | | 1983 | 428,495 | | 1982 | 419,246 | | 1981 | 410,126 | | 1980 | 401,130 | | 1979 | 392,289 | | 1978 | 383,697 | | 1977 | 375,640 | | 1976 | 368,864 | | 1975 | 364,363 | | 1974 | 360,595 | | 1973 | 357,026 | | 1972 | 353,199 | | 1971 | 348,909 | | 1970 | 344,239 | | 1969 | 339,270 | | 1968 | 334,012 | | 1967 | 328,416 | | 1966 | 322,312 | | 1965 | 316,197 | | 1964 | 309,586 | | 1963 | 302,777 | | 1962 | 295,867 | | 1961 | 289,146 | | 1960 | 282,571 |
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