Year | Value | 2023 | 55,800,866 | 2022 | 55,325,029 | 2021 | 54,832,812 | 2020 | 54,279,610 | 2019 | 53,603,652 | 2018 | 52,824,391 | 2017 | 51,934,543 | 2016 | 50,922,324 | 2015 | 49,870,440 | 2014 | 48,798,963 | 2013 | 47,669,983 | 2012 | 46,574,358 | 2011 | 45,568,543 | 2010 | 44,646,901 | 2009 | 43,850,602 | 2008 | 43,183,503 | 2007 | 42,516,640 | 2006 | 41,766,116 | 2005 | 40,955,748 | 2004 | 40,094,701 | 2003 | 39,216,096 | 2002 | 38,377,451 | 2001 | 37,553,696 | 2000 | 36,757,985 | 1999 | 36,017,093 | 1998 | 35,298,444 | 1997 | 34,588,575 | 1996 | 33,904,695 | 1995 | 33,229,857 | 1994 | 32,516,925 | 1993 | 31,778,387 | 1992 | 31,051,719 | 1991 | 30,333,430 | 1990 | 29,611,506 | 1989 | 28,889,098 | 1988 | 28,150,795 | 1987 | 27,370,781 | 1986 | 26,560,908 | 1985 | 25,728,362 | 1984 | 24,883,528 | 1983 | 23,884,372 | 1982 | 22,772,603 | 1981 | 21,730,454 | 1980 | 20,737,139 | 1979 | 19,795,870 | 1978 | 19,093,475 | 1977 | 18,618,060 | 1976 | 18,212,739 | 1975 | 17,889,536 | 1974 | 17,641,402 |
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