| Year | Value | | 2022 | 14,068,717 | | 2021 | 13,381,313 | | 2020 | 12,916,123 | | 2019 | 12,541,939 | | 2018 | 12,263,456 | | 2017 | 12,104,854 | | 2016 | 11,914,496 | | 2015 | 11,700,502 | | 2014 | 11,566,258 | | 2013 | 11,443,155 | | 2012 | 11,209,682 | | 2011 | 10,876,766 | | 2010 | 10,534,674 | | 2009 | 10,184,106 | | 2008 | 9,780,398 | | 2007 | 9,399,561 | | 2006 | 9,060,996 | | 2005 | 8,714,577 | | 2004 | 8,398,870 | | 2003 | 8,072,714 | | 2002 | 7,704,976 | | 2001 | 7,388,560 | | 2000 | 7,070,143 | | 1999 | 6,679,538 | | 1998 | 6,288,998 | | 1997 | 5,960,212 | | 1996 | 5,662,798 | | 1995 | 5,374,626 | | 1994 | 5,141,108 | | 1993 | 4,973,680 | | 1992 | 4,794,550 | | 1991 | 4,582,761 | | 1990 | 4,376,019 | | 1989 | 4,160,447 | | 1988 | 3,933,114 | | 1987 | 3,741,260 | | 1986 | 3,595,086 | | 1985 | 3,459,343 | | 1984 | 3,310,480 | | 1983 | 3,169,527 | | 1982 | 3,051,672 | | 1981 | 2,934,896 | | 1980 | 2,806,532 | | 1979 | 2,661,387 | | 1978 | 2,500,845 | | 1977 | 2,348,105 | | 1976 | 2,212,181 | | 1975 | 2,094,903 | | 1974 | 2,010,606 | | 1973 | 1,938,664 | | 1972 | 1,860,896 | | 1971 | 1,783,839 | | 1970 | 1,706,740 | | 1969 | 1,642,533 | | 1968 | 1,591,992 | | 1967 | 1,548,116 | | 1966 | 1,523,048 | | 1965 | 1,515,148 | | 1964 | 1,504,688 | | 1963 | 1,487,976 | | 1962 | 1,477,040 | | 1961 | 1,505,387 | | 1960 | 1,602,766 |
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