| Year | Value | | 2022 | 27,959,125 | | 2021 | 26,671,558 | | 2020 | 25,424,568 | | 2019 | 24,222,096 | | 2018 | 23,073,805 | | 2017 | 21,975,004 | | 2016 | 20,917,553 | | 2015 | 19,908,240 | | 2014 | 18,949,891 | | 2013 | 18,033,421 | | 2012 | 17,152,352 | | 2011 | 16,283,910 | | 2010 | 15,455,093 | | 2009 | 14,670,369 | | 2008 | 13,927,358 | | 2007 | 13,214,505 | | 2006 | 12,670,080 | | 2005 | 12,162,781 | | 2004 | 11,674,671 | | 2003 | 11,202,149 | | 2002 | 10,744,849 | | 2001 | 10,302,456 | | 2000 | 9,880,497 | | 1999 | 9,470,740 | | 1998 | 9,072,083 | | 1997 | 8,686,581 | | 1996 | 8,312,232 | | 1995 | 7,947,281 | | 1994 | 7,579,366 | | 1993 | 7,191,947 | | 1992 | 6,821,835 | | 1991 | 6,425,449 | | 1990 | 6,042,692 | | 1989 | 5,719,059 | | 1988 | 5,405,036 | | 1987 | 5,103,240 | | 1986 | 4,841,566 | | 1985 | 4,613,952 | | 1984 | 4,403,269 | | 1983 | 4,213,518 | | 1982 | 4,023,884 | | 1981 | 3,800,379 | | 1980 | 3,637,823 | | 1979 | 3,550,266 | | 1978 | 3,432,758 | | 1977 | 3,312,220 | | 1976 | 3,188,520 | | 1975 | 3,051,113 | | 1974 | 2,921,828 | | 1973 | 2,793,797 | | 1972 | 2,668,698 | | 1971 | 2,547,960 | | 1970 | 2,431,112 | | 1969 | 2,318,609 | | 1968 | 2,211,917 | | 1967 | 2,110,179 | | 1966 | 1,989,607 | | 1965 | 1,876,076 | | 1964 | 1,767,491 | | 1963 | 1,665,815 | | 1962 | 1,570,857 | | 1961 | 1,481,731 | | 1960 | 1,398,516 |
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