Year | Value | 2022 | 55,953,638 | 2021 | 56,012,553 | 2020 | 57,632,408 | 2019 | 59,070,990 | 2018 | 59,409,403 | 2017 | 58,492,606 | 2016 | 57,107,570 | 2015 | 55,427,870 | 2014 | 53,376,965 | 2013 | 51,229,053 | 2012 | 48,811,631 | 2011 | 46,256,320 | 2010 | 43,678,822 | 2009 | 41,107,397 | 2008 | 38,920,403 | 2007 | 37,034,263 | 2006 | 35,769,378 | 2005 | 35,130,323 | 2004 | 34,620,204 | 2003 | 34,161,382 | 2002 | 33,844,632 | 2001 | 33,447,895 | 2000 | 33,000,767 | 1999 | 32,673,474 | 1998 | 32,346,609 | 1997 | 31,760,291 | 1996 | 30,930,055 | 1995 | 30,055,582 | 1994 | 29,178,413 | 1993 | 28,234,357 | 1992 | 27,352,912 | 1991 | 26,555,438 | 1990 | 25,794,277 | 1989 | 25,104,839 | 1988 | 24,338,301 | 1987 | 23,464,730 | 1986 | 22,672,266 | 1985 | 21,913,649 | 1984 | 21,071,499 | 1983 | 20,250,993 | 1982 | 19,598,258 | 1981 | 19,074,488 | 1980 | 18,605,449 | 1979 | 18,277,427 | 1978 | 18,080,435 | 1977 | 17,804,597 | 1976 | 17,404,368 | 1975 | 16,966,651 | 1974 | 16,499,054 | 1973 | 16,000,039 | 1972 | 15,557,891 | 1971 | 15,195,356 | 1970 | 14,830,290 | 1969 | 14,471,415 | 1968 | 14,160,063 | 1967 | 13,921,232 | 1966 | 13,682,179 | 1965 | 13,403,063 | 1964 | 13,085,642 | 1963 | 12,737,497 | 1962 | 12,391,078 | 1961 | 12,138,535 | 1960 | 12,086,990 |
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