Year | Value | 2022 | 53,127,139 | 2021 | 51,912,946 | 2020 | 50,462,901 | 2019 | 48,582,928 | 2018 | 46,585,269 | 2017 | 44,354,856 | 2016 | 41,985,204 | 2015 | 39,547,974 | 2014 | 37,129,925 | 2013 | 35,101,521 | 2012 | 33,363,007 | 2011 | 32,167,289 | 2010 | 31,532,197 | 2009 | 31,007,675 | 2008 | 30,539,615 | 2007 | 30,210,060 | 2006 | 29,817,550 | 2005 | 29,392,297 | 2004 | 29,102,063 | 2003 | 28,827,905 | 2002 | 28,319,825 | 2001 | 27,583,071 | 2000 | 26,793,588 | 1999 | 25,981,609 | 1998 | 25,089,546 | 1997 | 24,233,195 | 1996 | 23,450,967 | 1995 | 22,679,410 | 1994 | 21,958,691 | 1993 | 21,192,812 | 1992 | 20,342,706 | 1991 | 19,566,145 | 1990 | 18,837,214 | 1989 | 18,049,542 | 1988 | 17,275,370 | 1987 | 16,657,001 | 1986 | 16,152,720 | 1985 | 15,688,112 | 1984 | 15,351,074 | 1983 | 15,151,272 | 1982 | 14,893,770 | 1981 | 14,529,723 | 1980 | 14,129,820 | 1979 | 13,683,760 | 1978 | 13,195,123 | 1977 | 12,756,217 | 1976 | 12,394,756 | 1975 | 12,060,076 | 1974 | 11,709,889 | 1973 | 11,381,834 | 1972 | 11,109,313 | 1971 | 10,842,468 | 1970 | 10,529,610 | 1969 | 10,189,401 | 1968 | 9,817,296 | 1967 | 9,458,555 | 1966 | 9,122,254 | 1965 | 8,846,482 | 1964 | 8,694,921 | 1963 | 8,593,803 | 1962 | 8,465,527 | 1961 | 8,371,556 | 1960 | 8,370,656 |
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