Year | Value | 2022 | 16,026,840 | 2021 | 16,148,374 | 2020 | 16,217,610 | 2019 | 16,265,139 | 2018 | 16,275,714 | 2017 | 16,186,559 | 2016 | 16,076,544 | 2015 | 15,952,381 | 2014 | 15,784,740 | 2013 | 15,592,271 | 2012 | 15,445,114 | 2011 | 15,336,724 | 2010 | 15,276,198 | 2009 | 15,150,944 | 2008 | 15,000,718 | 2007 | 14,846,610 | 2006 | 14,685,575 | 2005 | 14,546,146 | 2004 | 14,449,602 | 2003 | 14,391,555 | 2002 | 14,314,046 | 2001 | 14,163,772 | 2000 | 13,769,463 | 1999 | 13,237,513 | 1998 | 12,767,238 | 1997 | 12,292,327 | 1996 | 11,918,573 | 1995 | 11,919,089 | 1994 | 12,104,477 | 1993 | 12,188,072 | 1992 | 12,272,575 | 1991 | 12,346,810 | 1990 | 12,312,881 | 1989 | 12,214,155 | 1988 | 12,103,565 | 1987 | 12,030,556 | 1986 | 12,008,653 | 1985 | 12,033,893 | 1984 | 12,074,761 | 1983 | 12,132,889 | 1982 | 12,164,379 | 1981 | 12,083,797 | 1980 | 11,912,627 | 1979 | 11,696,490 | 1978 | 11,476,360 | 1977 | 11,295,717 | 1976 | 11,177,020 | 1975 | 11,061,690 | 1974 | 10,738,332 | 1973 | 10,049,785 | 1972 | 9,187,351 | 1971 | 8,369,406 | 1970 | 7,741,987 | 1969 | 7,663,595 | 1968 | 8,198,023 | 1967 | 8,966,967 | 1966 | 9,701,976 | 1965 | 10,270,411 | 1964 | 10,577,917 | 1963 | 10,675,564 | 1962 | 10,690,563 | 1961 | 10,682,856 | 1960 | 10,648,964 |
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