Year | Value | 2022 | 53,948,643 | 2021 | 52,876,651 | 2020 | 51,818,623 | 2019 | 50,787,334 | 2018 | 49,820,939 | 2017 | 48,947,556 | 2016 | 48,125,436 | 2015 | 47,328,317 | 2014 | 46,547,847 | 2013 | 45,745,921 | 2012 | 44,896,512 | 2011 | 43,990,579 | 2010 | 43,030,311 | 2009 | 42,034,171 | 2008 | 41,034,664 | 2007 | 40,040,570 | 2006 | 39,061,535 | 2005 | 38,114,986 | 2004 | 37,218,654 | 2003 | 36,323,641 | 2002 | 35,372,894 | 2001 | 34,495,048 | 2000 | 33,787,142 | 1999 | 33,075,698 | 1998 | 32,338,135 | 1997 | 31,606,274 | 1996 | 30,778,682 | 1995 | 29,906,180 | 1994 | 29,142,738 | 1993 | 28,386,453 | 1992 | 27,541,259 | 1991 | 26,787,094 | 1990 | 26,140,494 | 1989 | 25,454,848 | 1988 | 24,758,153 | 1987 | 24,073,394 | 1986 | 23,394,228 | 1985 | 22,782,649 | 1984 | 22,194,843 | 1983 | 21,635,481 | 1982 | 21,083,309 | 1981 | 20,580,091 | 1980 | 20,171,104 | 1979 | 19,715,954 | 1978 | 19,184,975 | 1977 | 18,718,215 | 1976 | 18,310,380 | 1975 | 17,903,642 | 1974 | 17,512,639 | 1973 | 17,112,053 | 1972 | 16,687,947 | 1971 | 16,241,337 | 1970 | 15,775,965 | 1969 | 15,308,164 | 1968 | 14,850,819 | 1967 | 14,396,460 | 1966 | 13,961,944 | 1965 | 13,563,686 | 1964 | 13,183,429 | 1963 | 12,826,266 | 1962 | 12,491,353 | 1961 | 12,157,856 | 1960 | 11,828,854 |
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