Year | Value | 2022 | 19,047,009 | 2021 | 19,122,059 | 2020 | 19,265,250 | 2019 | 19,371,648 | 2018 | 19,473,970 | 2017 | 19,588,715 | 2016 | 19,702,267 | 2015 | 19,815,616 | 2014 | 19,908,979 | 2013 | 19,983,693 | 2012 | 20,058,035 | 2011 | 20,147,528 | 2010 | 20,246,871 | 2009 | 20,367,487 | 2008 | 20,537,875 | 2007 | 20,882,982 | 2006 | 21,193,760 | 2005 | 21,319,685 | 2004 | 21,451,748 | 2003 | 21,574,326 | 2002 | 21,730,496 | 2001 | 22,131,970 | 2000 | 22,442,971 | 1999 | 22,472,040 | 1998 | 22,507,344 | 1997 | 22,553,978 | 1996 | 22,619,004 | 1995 | 22,684,270 | 1994 | 22,730,211 | 1993 | 22,763,280 | 1992 | 22,794,284 | 1991 | 23,001,155 | 1990 | 23,201,835 | 1989 | 23,161,458 | 1988 | 23,057,662 | 1987 | 22,949,430 | 1986 | 22,836,841 | 1985 | 22,732,999 | 1984 | 22,640,547 | 1983 | 22,560,478 | 1982 | 22,475,741 | 1981 | 22,353,070 | 1980 | 22,207,282 | 1979 | 22,090,488 | 1978 | 21,951,464 | 1977 | 21,756,096 | 1976 | 21,551,634 | 1975 | 21,293,583 | 1974 | 21,029,429 | 1973 | 20,835,681 | 1972 | 20,657,957 | 1971 | 20,461,567 | 1970 | 20,250,398 | 1969 | 20,009,141 | 1968 | 19,799,831 | 1967 | 19,534,242 | 1966 | 19,215,450 | 1965 | 19,031,576 | 1964 | 18,919,126 | 1963 | 18,797,850 | 1962 | 18,676,550 | 1961 | 18,555,250 | 1960 | 18,406,905 |
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