Year | Value | 2022 | 16,128,260 | 2021 | 16,076,052 | 2020 | 16,008,688 | 2019 | 15,881,138 | 2018 | 15,744,030 | 2017 | 15,632,049 | 2016 | 15,543,028 | 2015 | 15,434,456 | 2014 | 15,308,832 | 2013 | 15,154,159 | 2012 | 14,993,170 | 2011 | 14,839,930 | 2010 | 14,751,239 | 2009 | 14,657,564 | 2008 | 14,593,574 | 2007 | 14,504,964 | 2006 | 14,327,863 | 2005 | 13,897,663 | 2004 | 13,334,358 | 2003 | 12,838,611 | 2002 | 12,336,917 | 2001 | 11,954,439 | 2000 | 11,963,306 | 1999 | 12,159,793 | 1998 | 12,256,601 | 1997 | 12,376,231 | 1996 | 12,491,333 | 1995 | 12,490,856 | 1994 | 12,404,348 | 1993 | 12,295,057 | 1992 | 12,212,332 | 1991 | 12,176,930 | 1990 | 12,184,820 | 1989 | 12,221,893 | 1988 | 12,283,116 | 1987 | 12,344,075 | 1986 | 12,369,590 | 1985 | 12,380,271 | 1984 | 12,391,397 | 1983 | 12,420,573 | 1982 | 12,472,181 | 1981 | 12,528,974 | 1980 | 12,533,055 | 1979 | 12,255,210 | 1978 | 11,509,804 | 1977 | 10,520,593 | 1976 | 9,567,426 | 1975 | 8,826,109 | 1974 | 8,720,736 | 1973 | 9,326,631 | 1972 | 10,191,387 | 1971 | 10,999,208 | 1970 | 11,610,691 | 1969 | 11,892,662 | 1968 | 11,914,526 | 1967 | 11,859,501 | 1966 | 11,782,625 | 1965 | 11,660,979 | 1964 | 11,476,457 | 1963 | 11,278,648 | 1962 | 11,093,322 | 1961 | 10,931,654 | 1960 | 10,805,556 |
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