Year | Value | 2022 | 44,863,270 | 2021 | 44,822,109 | 2020 | 44,763,140 | 2019 | 44,273,556 | 2018 | 43,708,850 | 2017 | 43,148,833 | 2016 | 42,577,718 | 2015 | 41,942,480 | 2014 | 41,303,962 | 2013 | 40,673,635 | 2012 | 40,015,199 | 2011 | 39,491,438 | 2010 | 39,014,200 | 2009 | 38,391,711 | 2008 | 38,009,156 | 2007 | 37,871,953 | 2006 | 37,368,271 | 2005 | 36,160,775 | 2004 | 34,814,441 | 2003 | 33,458,838 | 2002 | 31,946,143 | 2001 | 30,656,787 | 2000 | 30,148,421 | 1999 | 29,914,067 | 1998 | 29,415,952 | 1997 | 28,935,605 | 1996 | 28,579,041 | 1995 | 28,203,530 | 1994 | 27,809,953 | 1993 | 27,448,175 | 1992 | 27,123,849 | 1991 | 26,862,004 | 1990 | 26,665,769 | 1989 | 26,623,281 | 1988 | 26,649,631 | 1987 | 26,662,303 | 1986 | 26,680,073 | 1985 | 26,642,837 | 1984 | 26,489,707 | 1983 | 26,486,337 | 1982 | 26,531,056 | 1981 | 26,386,948 | 1980 | 26,276,674 | 1979 | 25,950,314 | 1978 | 24,852,610 | 1977 | 23,405,460 | 1976 | 22,176,851 | 1975 | 21,129,506 | 1974 | 20,691,265 | 1973 | 21,138,386 | 1972 | 21,970,001 | 1971 | 22,731,779 | 1970 | 23,219,354 | 1969 | 23,382,309 | 1968 | 23,269,960 | 1967 | 23,047,691 | 1966 | 22,702,382 | 1965 | 22,303,909 | 1964 | 21,862,606 | 1963 | 21,356,111 | 1962 | 20,919,921 | 1961 | 20,586,579 | 1960 | 20,267,580 |
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