Year | Value | 2022 | 30,767,000 | 2021 | 30,512,889 | 2020 | 29,638,108 | 2019 | 28,469,299 | 2018 | 27,320,772 | 2017 | 26,078,581 | 2016 | 25,095,409 | 2015 | 24,842,075 | 2014 | 24,838,478 | 2013 | 24,590,920 | 2012 | 24,368,057 | 2011 | 24,196,011 | 2010 | 23,941,904 | 2009 | 23,536,245 | 2008 | 23,106,467 | 2007 | 22,678,764 | 2006 | 22,330,847 | 2005 | 22,113,315 | 2004 | 22,076,166 | 2003 | 22,134,592 | 2002 | 22,176,036 | 2001 | 22,195,783 | 2000 | 22,147,791 | 1999 | 21,971,675 | 1998 | 21,894,978 | 1997 | 21,847,002 | 1996 | 21,654,634 | 1995 | 21,465,819 | 1994 | 21,087,695 | 1993 | 20,129,256 | 1992 | 18,909,224 | 1991 | 17,828,147 | 1990 | 16,923,218 | 1989 | 16,614,556 | 1988 | 17,024,365 | 1987 | 17,759,774 | 1986 | 18,450,297 | 1985 | 18,884,662 | 1984 | 18,956,687 | 1983 | 18,773,738 | 1982 | 18,468,963 | 1981 | 18,060,862 | 1980 | 17,652,692 | 1979 | 17,219,341 | 1978 | 16,727,793 | 1977 | 16,302,612 | 1976 | 15,966,999 | 1975 | 15,647,387 | 1974 | 15,329,598 | 1973 | 15,034,586 | 1972 | 14,690,352 | 1971 | 14,322,322 | 1970 | 13,967,877 | 1969 | 13,665,799 | 1968 | 13,364,151 | 1967 | 13,020,907 | 1966 | 12,689,159 | 1965 | 12,380,108 | 1964 | 12,091,196 | 1963 | 11,869,034 | 1962 | 11,683,380 | 1961 | 11,439,759 | 1960 | 11,168,012 |
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