Year | Value | 2022 | 42,988,217 | 2021 | 42,490,668 | 2020 | 42,392,331 | 2019 | 42,457,353 | 2018 | 42,535,639 | 2017 | 42,863,306 | 2016 | 43,384,925 | 2015 | 43,969,182 | 2014 | 44,825,148 | 2013 | 46,092,538 | 2012 | 47,552,531 | 2011 | 49,348,375 | 2010 | 52,587,244 | 2009 | 56,642,268 | 2008 | 59,949,310 | 2007 | 62,952,152 | 2006 | 65,258,752 | 2005 | 64,967,506 | 2004 | 62,809,042 | 2003 | 60,531,285 | 2002 | 58,533,916 | 2001 | 56,822,595 | 2000 | 55,284,991 | 1999 | 54,089,731 | 1998 | 52,994,489 | 1997 | 51,231,137 | 1996 | 49,613,135 | 1995 | 49,277,104 | 1994 | 50,159,656 | 1993 | 52,476,179 | 1992 | 55,667,182 | 1991 | 58,914,126 | 1990 | 62,255,939 | 1989 | 65,043,613 | 1988 | 66,711,431 | 1987 | 66,984,125 | 1986 | 66,305,441 | 1985 | 65,548,111 | 1984 | 64,734,469 | 1983 | 64,578,130 | 1982 | 64,449,502 | 1981 | 61,287,976 | 1980 | 55,622,358 | 1979 | 50,066,313 | 1978 | 44,697,834 | 1977 | 41,578,589 | 1976 | 42,405,425 | 1975 | 45,087,965 | 1974 | 47,694,140 | 1973 | 49,034,556 | 1972 | 48,809,381 | 1971 | 47,921,971 | 1970 | 46,530,084 | 1969 | 44,527,346 | 1968 | 42,299,420 | 1967 | 39,740,155 | 1966 | 37,169,238 | 1965 | 34,825,724 | 1964 | 32,794,861 | 1963 | 31,268,890 | 1962 | 29,922,233 | 1961 | 29,147,240 | 1960 | 29,053,882 |
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