| Year | Value | | 2023 | 71,702,435 | | 2022 | 71,735,329 | | 2021 | 71,727,332 | | 2020 | 71,641,484 | | 2019 | 71,522,271 | | 2018 | 71,376,079 | | 2017 | 71,160,187 | | 2016 | 70,859,841 | | 2015 | 70,540,795 | | 2014 | 70,216,367 | | 2013 | 69,845,114 | | 2012 | 69,436,098 | | 2011 | 69,007,208 | | 2010 | 68,579,447 | | 2009 | 68,121,080 | | 2008 | 67,619,830 | | 2007 | 67,102,394 | | 2006 | 66,567,687 | | 2005 | 66,017,420 | | 2004 | 65,452,047 | | 2003 | 64,868,166 | | 2002 | 64,266,437 | | 2001 | 63,651,141 | | 2000 | 63,007,815 | | 1999 | 62,299,043 | | 1998 | 61,522,630 | | 1997 | 60,724,584 | | 1996 | 59,920,064 | | 1995 | 59,098,232 | | 1994 | 58,260,854 | | 1993 | 57,408,198 | | 1992 | 56,528,834 | | 1991 | 55,637,434 | | 1990 | 54,738,329 | | 1989 | 53,848,956 | | 1988 | 52,969,595 | | 1987 | 52,074,105 | | 1986 | 51,177,834 | | 1985 | 50,270,753 | | 1984 | 49,351,708 | | 1983 | 48,423,309 | | 1982 | 47,494,577 | | 1981 | 46,575,855 | | 1980 | 45,650,022 | | 1979 | 44,718,434 | | 1978 | 43,788,976 | | 1977 | 42,843,974 | | 1976 | 41,896,504 | | 1975 | 40,940,005 | | 1974 | 39,952,891 |
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