Year | Value | 2022 | 37,457,971 | 2021 | 37,076,584 | 2020 | 36,688,772 | 2019 | 36,304,408 | 2018 | 35,927,511 | 2017 | 35,528,115 | 2016 | 35,107,264 | 2015 | 34,680,458 | 2014 | 34,248,603 | 2013 | 33,803,527 | 2012 | 33,352,169 | 2011 | 32,903,699 | 2010 | 32,464,865 | 2009 | 32,042,877 | 2008 | 31,634,992 | 2007 | 31,232,633 | 2006 | 30,833,022 | 2005 | 30,431,902 | 2004 | 30,033,125 | 2003 | 29,661,270 | 2002 | 29,301,817 | 2001 | 28,930,097 | 2000 | 28,554,415 | 1999 | 28,176,997 | 1998 | 27,791,825 | 1997 | 27,397,118 | 1996 | 26,999,093 | 1995 | 26,599,048 | 1994 | 26,201,551 | 1993 | 25,806,777 | 1992 | 25,400,676 | 1991 | 24,988,083 | 1990 | 24,570,814 | 1989 | 24,148,104 | 1988 | 23,720,590 | 1987 | 23,279,935 | 1986 | 22,824,446 | 1985 | 22,335,077 | 1984 | 21,817,271 | 1983 | 21,287,381 | 1982 | 20,746,765 | 1981 | 20,208,260 | 1980 | 19,678,444 | 1979 | 19,167,661 | 1978 | 18,679,859 | 1977 | 18,206,472 | 1976 | 17,756,516 | 1975 | 17,325,325 | 1974 | 16,902,383 | 1973 | 16,489,452 | 1972 | 16,081,438 | 1971 | 15,677,300 | 1970 | 15,274,351 | 1969 | 14,876,982 | 1968 | 14,490,077 | 1967 | 14,109,755 | 1966 | 13,738,502 | 1965 | 13,381,880 | 1964 | 13,044,254 | 1963 | 12,726,686 | 1962 | 12,404,757 | 1961 | 12,081,713 | 1960 | 11,769,774 |
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