Year | Value | 2022 | 56,418,805 | 2021 | 53,525,709 | 2020 | 48,381,415 | 2019 | 43,359,654 | 2018 | 38,562,306 | 2017 | 35,761,463 | 2016 | 36,419,306 | 2015 | 38,758,066 | 2014 | 41,069,816 | 2013 | 42,316,368 | 2012 | 42,217,096 | 2011 | 41,532,747 | 2010 | 40,457,597 | 2009 | 38,736,179 | 2008 | 36,616,649 | 2007 | 34,043,030 | 2006 | 31,419,968 | 2005 | 29,031,513 | 2004 | 26,809,789 | 2003 | 25,029,778 | 2002 | 23,593,294 | 2001 | 22,576,794 | 2000 | 21,859,251 | 1999 | 21,296,429 | 1998 | 20,892,611 | 1997 | 20,643,187 | 1996 | 20,409,911 | 1995 | 20,276,712 | 1994 | 20,312,662 | 1993 | 20,369,793 | 1992 | 20,247,929 | 1991 | 19,883,563 | 1990 | 19,434,834 | 1989 | 18,968,010 | 1988 | 18,448,554 | 1987 | 17,975,389 | 1986 | 17,558,449 | 1985 | 17,177,234 | 1984 | 16,897,135 | 1983 | 16,586,216 | 1982 | 16,193,088 | 1981 | 15,911,681 | 1980 | 15,647,069 | 1979 | 15,237,200 | 1978 | 14,781,375 | 1977 | 14,438,558 | 1976 | 14,183,520 | 1975 | 13,914,759 | 1974 | 13,708,275 | 1973 | 13,582,770 | 1972 | 13,353,404 | 1971 | 12,987,096 | 1970 | 12,625,035 | 1969 | 12,338,034 | 1968 | 12,103,212 | 1967 | 11,940,598 | 1966 | 11,874,963 | 1965 | 11,834,012 | 1964 | 11,766,920 | 1963 | 11,711,658 | 1962 | 11,656,098 | 1961 | 11,610,373 | 1960 | 11,599,767 |
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