Year | Value | 2022 | 22,142,391 | 2021 | 22,676,585 | 2020 | 22,755,739 | 2019 | 22,793,332 | 2018 | 22,806,875 | 2017 | 22,824,769 | 2016 | 22,849,639 | 2015 | 22,897,449 | 2014 | 22,960,228 | 2013 | 23,025,350 | 2012 | 23,086,831 | 2011 | 23,134,846 | 2010 | 23,165,018 | 2009 | 23,274,004 | 2008 | 23,300,939 | 2007 | 23,340,838 | 2006 | 23,396,235 | 2005 | 23,453,429 | 2004 | 23,506,503 | 2003 | 23,563,051 | 2002 | 23,621,395 | 2001 | 23,622,394 | 2000 | 23,611,695 | 1999 | 23,842,562 | 1998 | 23,827,143 | 1997 | 23,801,620 | 1996 | 23,768,665 | 1995 | 23,733,222 | 1994 | 23,684,074 | 1993 | 23,616,843 | 1992 | 23,539,562 | 1991 | 23,450,653 | 1990 | 23,350,476 | 1989 | 23,241,946 | 1988 | 23,089,202 | 1987 | 22,855,463 | 1986 | 22,589,785 | 1985 | 22,299,554 | 1984 | 21,984,900 | 1983 | 21,651,242 | 1982 | 21,314,754 | 1981 | 20,985,955 | 1980 | 20,663,601 | 1979 | 20,341,874 | 1978 | 20,007,316 | 1977 | 19,625,330 | 1976 | 19,215,135 | 1975 | 18,803,602 | 1974 | 18,398,446 | 1973 | 18,005,216 | 1972 | 17,626,595 | 1971 | 17,266,414 | 1970 | 17,026,266 | 1969 | 16,835,934 | 1968 | 16,575,555 | 1967 | 16,289,779 | 1966 | 16,007,142 | 1965 | 15,762,096 | 1964 | 15,484,714 | 1963 | 15,149,001 | 1962 | 14,828,737 | 1961 | 14,540,630 | 1960 | 14,193,968 |
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