| Year | Value | | 2022 | 515,236 | | 2021 | 516,348 | | 2020 | 516,027 | | 2019 | 516,091 | | 2018 | 516,267 | | 2017 | 516,592 | | 2016 | 516,999 | | 2015 | 517,780 | | 2014 | 518,495 | | 2013 | 518,955 | | 2012 | 519,081 | | 2011 | 519,046 | | 2010 | 519,604 | | 2009 | 519,754 | | 2008 | 519,756 | | 2007 | 519,269 | | 2006 | 518,278 | | 2005 | 517,242 | | 2004 | 515,544 | | 2003 | 513,680 | | 2002 | 511,325 | | 2001 | 509,128 | | 2000 | 506,439 | | 1999 | 502,932 | | 1998 | 498,006 | | 1997 | 494,198 | | 1996 | 489,444 | | 1995 | 485,844 | | 1994 | 483,053 | | 1993 | 477,687 | | 1992 | 473,391 | | 1991 | 468,530 | | 1990 | 464,802 | | 1989 | 458,181 | | 1988 | 451,399 | | 1987 | 445,028 | | 1986 | 438,482 | | 1985 | 431,938 | | 1984 | 425,254 | | 1983 | 417,715 | | 1982 | 416,035 | | 1981 | 413,108 | | 1980 | 409,127 | | 1979 | 404,358 | | 1978 | 399,416 | | 1977 | 396,239 | | 1976 | 391,829 | | 1975 | 387,512 | | 1974 | 383,371 | | 1973 | 379,491 | | 1972 | 375,755 | | 1971 | 363,605 | | 1970 | 351,513 | | 1969 | 339,504 | | 1968 | 327,573 | | 1967 | 315,676 | | 1966 | 303,804 | | 1965 | 291,916 | | 1964 | 280,009 | | 1963 | 268,035 | | 1962 | 256,013 | | 1961 | 243,908 | | 1960 | 237,590 |
|