Year | Value | 2023 | 60,169,667 | 2022 | 60,609,416 | 2021 | 61,074,946 | 2020 | 61,362,594 | 2019 | 61,354,851 | 2018 | 61,155,886 | 2017 | 60,811,876 | 2016 | 60,332,085 | 2015 | 59,877,993 | 2014 | 59,536,152 | 2013 | 59,207,882 | 2012 | 58,872,134 | 2011 | 58,538,109 | 2010 | 58,150,510 | 2009 | 57,759,340 | 2008 | 57,403,479 | 2007 | 56,994,405 | 2006 | 56,560,035 | 2005 | 56,083,612 | 2004 | 55,467,366 | 2003 | 54,713,969 | 2002 | 53,856,553 | 2001 | 52,887,857 | 2000 | 51,860,295 | 1999 | 50,789,299 | 1998 | 49,656,246 | 1997 | 48,551,440 | 1996 | 47,533,632 | 1995 | 46,594,848 | 1994 | 45,760,920 | 1993 | 45,043,022 | 1992 | 44,330,401 | 1991 | 43,541,951 | 1990 | 42,694,071 | 1989 | 41,800,824 | 1988 | 40,902,316 | 1987 | 40,050,533 | 1986 | 39,221,668 | 1985 | 38,421,435 | 1984 | 37,675,847 | 1983 | 36,953,627 | 1982 | 36,244,777 | 1981 | 35,566,217 | 1980 | 34,890,669 | 1979 | 34,182,195 | 1978 | 33,460,928 | 1977 | 32,758,317 | 1976 | 32,080,274 | 1975 | 31,415,509 | 1974 | 30,749,968 |
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