| Year | Value | | 2024 | 67,401,427 | | 2023 | 66,813,627 | | 2022 | 66,211,396 | | 2021 | 65,668,355 | | 2020 | 65,163,578 | | 2019 | 64,578,493 | | 2018 | 63,932,674 | | 2017 | 63,292,732 | | 2016 | 62,658,212 | | 2015 | 62,006,294 | | 2014 | 61,307,925 | | 2013 | 60,547,316 | | 2012 | 59,751,889 | | 2011 | 58,938,429 | | 2010 | 58,110,700 | | 2009 | 57,284,985 | | 2008 | 56,463,306 | | 2007 | 55,655,575 | | 2006 | 54,885,582 | | 2005 | 54,151,768 | | 2004 | 53,428,954 | | 2003 | 52,706,226 | | 2002 | 51,975,645 | | 2001 | 51,234,745 | | 2000 | 50,465,710 | | 1999 | 49,664,369 | | 1998 | 48,849,958 | | 1997 | 48,029,166 | | 1996 | 47,200,873 | | 1995 | 46,361,119 | | 1994 | 45,513,846 | | 1993 | 44,664,821 | | 1992 | 43,814,602 | | 1991 | 42,962,984 | | 1990 | 42,111,877 | | 1989 | 41,266,637 | | 1988 | 40,421,903 | | 1987 | 39,574,319 | | 1986 | 38,730,664 | | 1985 | 37,891,290 | | 1984 | 37,054,511 | | 1983 | 36,217,606 | | 1982 | 35,378,903 | | 1981 | 34,538,832 | | 1980 | 33,702,828 | | 1979 | 32,866,764 | | 1978 | 32,023,114 | | 1977 | 31,180,517 | | 1976 | 30,342,786 | | 1975 | 29,505,523 |
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