| Year | Value | | 2022 | 20,766,442 | | 2021 | 20,254,878 | | 2020 | 19,692,301 | | 2019 | 19,090,409 | | 2018 | 18,549,862 | | 2017 | 18,028,696 | | 2016 | 17,520,861 | | 2015 | 17,071,446 | | 2014 | 16,543,889 | | 2013 | 15,946,572 | | 2012 | 15,399,105 | | 2011 | 14,780,282 | | 2010 | 14,240,377 | | 2009 | 13,827,977 | | 2008 | 13,339,006 | | 2007 | 13,067,961 | | 2006 | 12,828,447 | | 2005 | 12,302,104 | | 2004 | 11,862,726 | | 2003 | 11,397,483 | | 2002 | 10,562,202 | | 2001 | 9,895,467 | | 2000 | 9,815,442 | | 1999 | 9,667,811 | | 1998 | 9,275,541 | | 1997 | 8,916,862 | | 1996 | 8,569,175 | | 1995 | 8,219,467 | | 1994 | 7,733,458 | | 1993 | 7,003,641 | | 1992 | 6,028,494 | | 1991 | 5,372,959 | | 1990 | 5,348,387 | | 1989 | 5,338,559 | | 1988 | 5,195,399 | | 1987 | 5,170,108 | | 1986 | 5,241,168 | | 1985 | 5,286,542 | | 1984 | 5,169,086 | | 1983 | 5,035,098 | | 1982 | 5,114,320 | | 1981 | 5,665,035 | | 1980 | 6,349,775 | | 1979 | 6,612,822 | | 1978 | 6,596,024 | | 1977 | 6,472,323 | | 1976 | 6,342,102 | | 1975 | 6,209,118 | | 1974 | 6,066,275 | | 1973 | 5,920,001 | | 1972 | 5,776,971 | | 1971 | 5,643,110 | | 1970 | 5,513,404 | | 1969 | 5,385,983 | | 1968 | 5,264,694 | | 1967 | 5,148,111 | | 1966 | 5,037,166 | | 1965 | 4,930,806 | | 1964 | 4,828,823 | | 1963 | 4,732,954 | | 1962 | 4,642,166 | | 1961 | 4,556,369 | | 1960 | 4,476,521 |
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