Year | Value | 2022 | 46,611,541 | 2021 | 45,258,837 | 2020 | 45,033,970 | 2019 | 45,922,709 | 2018 | 48,140,015 | 2017 | 51,152,128 | 2016 | 54,188,614 | 2015 | 57,233,400 | 2014 | 59,701,209 | 2013 | 61,187,873 | 2012 | 61,391,735 | 2011 | 60,682,030 | 2010 | 59,953,743 | 2009 | 59,207,156 | 2008 | 59,076,925 | 2007 | 58,977,650 | 2006 | 56,042,562 | 2005 | 50,730,993 | 2004 | 45,527,148 | 2003 | 40,556,640 | 2002 | 37,666,099 | 2001 | 38,386,322 | 2000 | 40,844,788 | 1999 | 43,243,501 | 1998 | 44,484,509 | 1997 | 44,295,163 | 1996 | 43,494,404 | 1995 | 42,262,552 | 1994 | 40,354,762 | 1993 | 38,074,716 | 1992 | 35,381,001 | 1991 | 32,670,440 | 1990 | 30,275,199 | 1989 | 28,082,087 | 1988 | 26,296,818 | 1987 | 24,862,057 | 1986 | 23,882,321 | 1985 | 23,215,582 | 1984 | 22,718,995 | 1983 | 22,401,632 | 1982 | 22,256,171 | 1981 | 22,142,448 | 1980 | 22,150,010 | 1979 | 22,327,939 | 1978 | 22,491,540 | 1977 | 22,435,677 | 1976 | 22,112,153 | 1975 | 21,646,649 | 1974 | 21,137,760 | 1973 | 20,589,210 | 1972 | 20,087,829 | 1971 | 19,633,276 | 1970 | 19,205,560 | 1969 | 18,913,590 | 1968 | 18,612,651 | 1967 | 18,223,854 | 1966 | 17,942,612 | 1965 | 17,671,135 | 1964 | 17,337,154 | 1963 | 17,035,642 | 1962 | 16,823,717 | 1961 | 16,757,022 | 1960 | 16,823,086 |
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