Year | Value | 2022 | 74,360,571 | 2021 | 71,130,958 | 2020 | 65,617,588 | 2019 | 60,208,878 | 2018 | 54,980,041 | 2017 | 51,725,611 | 2016 | 51,927,528 | 2015 | 53,758,447 | 2014 | 55,514,168 | 2013 | 56,185,543 | 2012 | 55,492,168 | 2011 | 54,212,347 | 2010 | 52,562,681 | 2009 | 50,301,824 | 2008 | 47,653,490 | 2007 | 44,562,709 | 2006 | 41,488,283 | 2005 | 38,695,157 | 2004 | 36,070,443 | 2003 | 33,955,058 | 2002 | 32,265,682 | 2001 | 31,050,172 | 2000 | 30,196,541 | 1999 | 29,535,786 | 1998 | 29,024,778 | 1997 | 28,655,638 | 1996 | 28,291,586 | 1995 | 28,013,092 | 1994 | 27,897,544 | 1993 | 27,802,112 | 1992 | 27,517,779 | 1991 | 26,977,436 | 1990 | 26,341,974 | 1989 | 25,681,486 | 1988 | 24,961,771 | 1987 | 24,280,549 | 1986 | 23,654,539 | 1985 | 23,067,381 | 1984 | 22,583,970 | 1983 | 22,072,821 | 1982 | 21,486,900 | 1981 | 21,021,958 | 1980 | 20,582,960 | 1979 | 20,007,648 | 1978 | 19,400,792 | 1977 | 18,924,577 | 1976 | 18,552,392 | 1975 | 18,184,649 | 1974 | 17,895,797 | 1973 | 17,697,839 | 1972 | 17,399,947 | 1971 | 16,964,858 | 1970 | 16,530,248 | 1969 | 16,165,096 | 1968 | 15,845,295 | 1967 | 15,591,720 | 1966 | 15,433,480 | 1965 | 15,303,186 | 1964 | 15,146,577 | 1963 | 15,002,004 | 1962 | 14,858,594 | 1961 | 14,720,857 | 1960 | 14,613,415 |
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