Year | Value | 2022 | 31,360,272 | 2021 | 34,749,474 | 2020 | 37,541,058 | 2019 | 39,552,452 | 2018 | 40,995,217 | 2017 | 41,692,288 | 2016 | 41,645,333 | 2015 | 41,544,806 | 2014 | 41,420,468 | 2013 | 41,080,719 | 2012 | 40,449,171 | 2011 | 39,723,209 | 2010 | 39,194,544 | 2009 | 38,543,073 | 2008 | 37,824,019 | 2007 | 37,237,335 | 2006 | 36,894,596 | 2005 | 36,920,237 | 2004 | 37,089,296 | 2003 | 37,272,500 | 2002 | 37,672,135 | 2001 | 38,262,693 | 2000 | 38,918,556 | 1999 | 39,811,660 | 1998 | 41,070,643 | 1997 | 42,517,046 | 1996 | 44,300,343 | 1995 | 47,398,271 | 1994 | 51,223,301 | 1993 | 54,386,781 | 1992 | 57,327,396 | 1991 | 59,678,514 | 1990 | 59,789,474 | 1989 | 58,250,959 | 1988 | 56,497,681 | 1987 | 54,961,789 | 1986 | 53,672,118 | 1985 | 52,502,064 | 1984 | 51,652,870 | 1983 | 50,903,904 | 1982 | 49,502,448 | 1981 | 48,244,860 | 1980 | 48,242,294 | 1979 | 49,410,161 | 1978 | 51,923,045 | 1977 | 55,270,445 | 1976 | 58,721,326 | 1975 | 62,176,390 | 1974 | 65,016,013 | 1973 | 66,791,845 | 1972 | 67,169,256 | 1971 | 66,561,785 | 1970 | 65,799,572 | 1969 | 65,015,096 | 1968 | 64,916,372 | 1967 | 64,864,101 | 1966 | 61,777,433 | 1965 | 56,132,581 | 1964 | 50,844,988 | 1963 | 45,787,726 | 1962 | 42,692,170 | 1961 | 44,193,476 | 1960 | 48,865,235 |
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