Year | Value | 2022 | 17,657,930 | 2021 | 17,308,463 | 2020 | 16,973,620 | 2019 | 16,644,772 | 2018 | 16,320,520 | 2017 | 16,016,163 | 2016 | 15,716,939 | 2015 | 15,414,708 | 2014 | 15,117,410 | 2013 | 14,834,290 | 2012 | 14,574,618 | 2011 | 14,332,297 | 2010 | 14,008,143 | 2009 | 13,752,638 | 2008 | 13,654,403 | 2007 | 13,566,997 | 2006 | 13,503,445 | 2005 | 13,466,323 | 2004 | 13,435,495 | 2003 | 13,404,863 | 2002 | 13,371,841 | 2001 | 13,329,518 | 2000 | 13,280,156 | 1999 | 13,214,840 | 1998 | 13,188,606 | 1997 | 13,091,401 | 1996 | 12,957,692 | 1995 | 12,820,892 | 1994 | 12,697,829 | 1993 | 12,555,212 | 1992 | 12,374,357 | 1991 | 12,186,521 | 1990 | 12,026,038 | 1989 | 11,881,418 | 1988 | 11,625,757 | 1987 | 11,313,334 | 1986 | 11,004,229 | 1985 | 10,707,504 | 1984 | 10,427,476 | 1983 | 10,163,754 | 1982 | 9,914,530 | 1981 | 9,675,601 | 1980 | 9,443,571 | 1979 | 9,211,806 | 1978 | 9,011,361 | 1977 | 8,831,512 | 1976 | 8,646,246 | 1975 | 8,463,464 | 1974 | 8,284,673 | 1973 | 8,109,744 | 1972 | 7,938,285 | 1971 | 7,770,415 | 1970 | 7,601,510 | 1969 | 7,409,438 | 1968 | 7,197,626 | 1967 | 6,983,768 | 1966 | 6,770,032 | 1965 | 6,555,286 | 1964 | 6,340,356 | 1963 | 6,128,841 | 1962 | 5,920,035 | 1961 | 5,716,065 | 1960 | 5,527,567 |
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