Year | Value | 2022 | 14,464,437 | 2021 | 14,578,788 | 2020 | 14,755,971 | 2019 | 14,919,872 | 2018 | 15,074,818 | 2017 | 15,193,508 | 2016 | 15,289,820 | 2015 | 15,358,090 | 2014 | 15,437,159 | 2013 | 15,509,923 | 2012 | 15,570,077 | 2011 | 15,674,831 | 2010 | 15,834,341 | 2009 | 15,956,680 | 2008 | 16,108,463 | 2007 | 16,263,482 | 2006 | 16,355,754 | 2005 | 16,408,940 | 2004 | 16,457,067 | 2003 | 16,453,973 | 2002 | 16,365,135 | 2001 | 16,284,857 | 2000 | 16,236,343 | 1999 | 16,139,066 | 1998 | 16,004,642 | 1997 | 15,917,814 | 1996 | 15,851,735 | 1995 | 15,771,313 | 1994 | 15,680,166 | 1993 | 15,560,721 | 1992 | 15,421,588 | 1991 | 15,275,047 | 1990 | 15,140,141 | 1989 | 15,049,987 | 1988 | 14,991,161 | 1987 | 14,920,278 | 1986 | 14,771,108 | 1985 | 14,364,406 | 1984 | 13,832,533 | 1983 | 13,375,176 | 1982 | 12,904,948 | 1981 | 12,545,067 | 1980 | 12,553,868 | 1979 | 12,749,063 | 1978 | 12,865,927 | 1977 | 12,998,495 | 1976 | 13,131,714 | 1975 | 13,142,909 | 1974 | 13,062,782 | 1973 | 12,966,506 | 1972 | 12,899,418 | 1971 | 12,864,514 | 1970 | 12,897,307 | 1969 | 12,961,845 | 1968 | 13,036,546 | 1967 | 13,119,395 | 1966 | 13,166,296 | 1965 | 13,196,434 | 1964 | 13,221,692 | 1963 | 13,253,723 | 1962 | 13,297,536 | 1961 | 13,340,479 | 1960 | 13,342,208 |
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