Year | Value | 2022 | 34,060,500 | 2021 | 33,657,047 | 2020 | 33,275,624 | 2019 | 32,710,884 | 2018 | 32,408,154 | 2017 | 32,268,868 | 2016 | 31,827,738 | 2015 | 30,818,480 | 2014 | 29,628,874 | 2013 | 28,412,011 | 2012 | 27,119,795 | 2011 | 25,962,628 | 2010 | 25,495,110 | 2009 | 25,258,789 | 2008 | 24,763,892 | 2007 | 24,266,537 | 2006 | 23,917,101 | 2005 | 23,507,576 | 2004 | 23,039,140 | 2003 | 22,670,166 | 2002 | 22,349,583 | 2001 | 22,042,630 | 2000 | 21,841,234 | 1999 | 21,816,728 | 1998 | 21,765,975 | 1997 | 21,627,170 | 1996 | 21,395,317 | 1995 | 20,963,195 | 1994 | 20,354,595 | 1993 | 19,848,914 | 1992 | 19,438,757 | 1991 | 18,977,111 | 1990 | 18,632,059 | 1989 | 18,268,654 | 1988 | 17,465,789 | 1987 | 16,477,947 | 1986 | 15,658,768 | 1985 | 14,944,584 | 1984 | 14,628,400 | 1983 | 14,912,827 | 1982 | 15,481,729 | 1981 | 15,987,696 | 1980 | 16,329,196 | 1979 | 16,441,517 | 1978 | 16,358,654 | 1977 | 16,203,557 | 1976 | 15,980,377 | 1975 | 15,737,766 | 1974 | 15,473,836 | 1973 | 15,158,296 | 1972 | 14,878,996 | 1971 | 14,648,196 | 1970 | 14,370,845 | 1969 | 14,087,041 | 1968 | 13,815,633 | 1967 | 13,468,513 | 1966 | 13,050,109 | 1965 | 12,662,607 | 1964 | 12,302,332 | 1963 | 11,957,525 | 1962 | 11,625,646 | 1961 | 11,349,565 | 1960 | 11,118,846 |
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