Year | Value | 2022 | 72,880,626 | 2021 | 69,713,692 | 2020 | 64,299,370 | 2019 | 58,964,297 | 2018 | 53,784,732 | 2017 | 50,539,861 | 2016 | 50,722,436 | 2015 | 52,510,251 | 2014 | 54,189,172 | 2013 | 54,763,042 | 2012 | 53,964,216 | 2011 | 52,612,510 | 2010 | 50,937,858 | 2009 | 48,744,879 | 2008 | 46,298,822 | 2007 | 43,547,067 | 2006 | 40,842,194 | 2005 | 38,349,341 | 2004 | 35,980,721 | 2003 | 34,047,786 | 2002 | 32,421,753 | 2001 | 31,255,199 | 2000 | 30,544,465 | 1999 | 30,024,584 | 1998 | 29,659,154 | 1997 | 29,452,182 | 1996 | 29,161,998 | 1995 | 28,820,852 | 1994 | 28,580,611 | 1993 | 28,344,765 | 1992 | 27,891,322 | 1991 | 27,226,292 | 1990 | 26,567,592 | 1989 | 25,905,832 | 1988 | 25,131,342 | 1987 | 24,398,693 | 1986 | 23,732,748 | 1985 | 23,075,487 | 1984 | 22,511,194 | 1983 | 21,919,500 | 1982 | 21,243,297 | 1981 | 20,689,873 | 1980 | 20,173,616 | 1979 | 19,531,996 | 1978 | 18,869,825 | 1977 | 18,337,784 | 1976 | 17,898,396 | 1975 | 17,484,306 | 1974 | 17,195,491 | 1973 | 17,025,939 | 1972 | 16,770,980 | 1971 | 16,387,275 | 1970 | 15,971,398 | 1969 | 15,552,596 | 1968 | 15,130,523 | 1967 | 14,773,402 | 1966 | 14,516,230 | 1965 | 14,305,362 | 1964 | 14,122,691 | 1963 | 14,006,718 | 1962 | 13,918,022 | 1961 | 13,859,254 | 1960 | 13,870,643 |
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