Year | Value | 2022 | 28,572,460 | 2021 | 27,512,998 | 2020 | 26,876,640 | 2019 | 26,241,003 | 2018 | 25,588,922 | 2017 | 25,024,639 | 2016 | 24,465,577 | 2015 | 24,012,969 | 2014 | 23,755,262 | 2013 | 23,549,375 | 2012 | 23,195,954 | 2011 | 22,634,488 | 2010 | 21,963,483 | 2009 | 21,254,117 | 2008 | 20,522,706 | 2007 | 19,815,554 | 2006 | 19,165,497 | 2005 | 18,545,398 | 2004 | 17,966,770 | 2003 | 17,360,308 | 2002 | 16,701,279 | 2001 | 16,101,242 | 2000 | 15,520,371 | 1999 | 14,864,234 | 1998 | 14,174,331 | 1997 | 13,565,923 | 1996 | 13,043,151 | 1995 | 12,540,595 | 1994 | 12,131,718 | 1993 | 11,837,583 | 1992 | 11,520,193 | 1991 | 11,142,292 | 1990 | 10,765,458 | 1989 | 10,401,676 | 1988 | 10,032,373 | 1987 | 9,698,104 | 1986 | 9,412,854 | 1985 | 9,143,830 | 1984 | 8,841,501 | 1983 | 8,536,023 | 1982 | 8,270,293 | 1981 | 8,016,822 | 1980 | 7,735,581 | 1979 | 7,401,531 | 1978 | 7,024,538 | 1977 | 6,650,985 | 1976 | 6,303,778 | 1975 | 5,997,180 | 1974 | 5,764,342 | 1973 | 5,571,270 | 1972 | 5,381,371 | 1971 | 5,187,852 | 1970 | 4,974,236 | 1969 | 4,786,922 | 1968 | 4,628,390 | 1967 | 4,483,549 | 1966 | 4,359,739 | 1965 | 4,260,979 | 1964 | 4,162,803 | 1963 | 4,058,149 | 1962 | 3,970,505 | 1961 | 3,955,310 | 1960 | 4,041,799 |
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