Year | Value | 2022 | 26,069,416 | 2021 | 25,971,909 | 2020 | 25,867,467 | 2019 | 25,755,441 | 2018 | 25,638,149 | 2017 | 25,516,321 | 2016 | 25,389,611 | 2015 | 25,258,015 | 2014 | 25,126,131 | 2013 | 25,001,819 | 2012 | 24,887,770 | 2011 | 24,783,789 | 2010 | 24,686,435 | 2009 | 24,581,509 | 2008 | 24,469,047 | 2007 | 24,356,506 | 2006 | 24,235,761 | 2005 | 24,100,982 | 2004 | 23,948,930 | 2003 | 23,781,707 | 2002 | 23,638,411 | 2001 | 23,512,522 | 2000 | 23,367,059 | 1999 | 23,204,498 | 1998 | 23,023,636 | 1997 | 22,827,373 | 1996 | 22,614,347 | 1995 | 22,385,536 | 1994 | 22,105,225 | 1993 | 21,773,017 | 1992 | 21,439,991 | 1991 | 21,115,534 | 1990 | 20,799,523 | 1989 | 20,494,965 | 1988 | 20,197,464 | 1987 | 19,903,893 | 1986 | 19,613,038 | 1985 | 19,325,487 | 1984 | 19,045,154 | 1983 | 18,771,363 | 1982 | 18,502,087 | 1981 | 18,235,202 | 1980 | 17,973,650 | 1979 | 17,719,172 | 1978 | 17,472,094 | 1977 | 17,231,389 | 1976 | 16,987,170 | 1975 | 16,723,252 | 1974 | 16,437,002 | 1973 | 16,128,122 | 1972 | 15,768,363 | 1971 | 15,381,626 | 1970 | 14,996,879 | 1969 | 14,605,481 | 1968 | 14,216,305 | 1967 | 13,821,409 | 1966 | 13,444,048 | 1965 | 13,105,946 | 1964 | 12,787,523 | 1963 | 12,475,236 | 1962 | 12,180,505 | 1961 | 11,916,515 | 1960 | 11,655,666 |
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