Year | Value | 2022 | 50,758,046 | 2021 | 50,971,543 | 2020 | 52,754,248 | 2019 | 54,420,040 | 2018 | 55,002,567 | 2017 | 54,241,157 | 2016 | 52,915,010 | 2015 | 51,236,512 | 2014 | 48,963,508 | 2013 | 46,334,065 | 2012 | 43,312,705 | 2011 | 40,330,564 | 2010 | 37,648,670 | 2009 | 35,132,749 | 2008 | 33,105,769 | 2007 | 31,488,718 | 2006 | 30,322,016 | 2005 | 29,488,697 | 2004 | 28,855,049 | 2003 | 28,398,432 | 2002 | 28,084,558 | 2001 | 27,758,614 | 2000 | 27,484,538 | 1999 | 27,336,553 | 1998 | 27,186,613 | 1997 | 26,842,177 | 1996 | 26,238,540 | 1995 | 25,510,131 | 1994 | 24,747,108 | 1993 | 23,953,389 | 1992 | 23,216,567 | 1991 | 22,550,184 | 1990 | 21,951,884 | 1989 | 21,460,161 | 1988 | 20,933,001 | 1987 | 20,342,425 | 1986 | 19,863,570 | 1985 | 19,396,232 | 1984 | 18,813,006 | 1983 | 18,220,065 | 1982 | 17,748,600 | 1981 | 17,368,602 | 1980 | 17,002,315 | 1979 | 16,696,893 | 1978 | 16,457,288 | 1977 | 16,127,162 | 1976 | 15,686,003 | 1975 | 15,254,759 | 1974 | 14,877,567 | 1973 | 14,532,959 | 1972 | 14,257,681 | 1971 | 14,080,469 | 1970 | 13,919,715 | 1969 | 13,694,232 | 1968 | 13,455,404 | 1967 | 13,246,843 | 1966 | 12,988,328 | 1965 | 12,637,563 | 1964 | 12,242,296 | 1963 | 11,828,530 | 1962 | 11,429,853 | 1961 | 11,149,032 | 1960 | 11,086,227 |
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