Year | Value | 2022 | 33,333,765 | 2021 | 33,254,413 | 2020 | 33,055,401 | 2019 | 32,893,551 | 2018 | 32,641,486 | 2017 | 32,372,520 | 2016 | 32,180,899 | 2015 | 31,969,777 | 2014 | 31,774,865 | 2013 | 31,643,342 | 2012 | 31,572,473 | 2011 | 31,588,699 | 2010 | 31,651,296 | 2009 | 31,661,665 | 2008 | 31,734,386 | 2007 | 31,786,662 | 2006 | 31,761,345 | 2005 | 31,772,661 | 2004 | 31,897,161 | 2003 | 32,074,246 | 2002 | 32,254,400 | 2001 | 32,514,969 | 2000 | 32,802,785 | 1999 | 32,951,194 | 1998 | 32,893,222 | 1997 | 32,754,151 | 1996 | 32,513,025 | 1995 | 32,133,684 | 1994 | 31,768,782 | 1993 | 31,432,091 | 1992 | 31,030,818 | 1991 | 30,594,127 | 1990 | 30,202,473 | 1989 | 29,907,917 | 1988 | 29,562,973 | 1987 | 29,137,165 | 1986 | 28,581,632 | 1985 | 27,404,557 | 1984 | 25,744,997 | 1983 | 24,185,630 | 1982 | 22,859,736 | 1981 | 22,131,596 | 1980 | 22,459,560 | 1979 | 23,498,075 | 1978 | 24,724,930 | 1977 | 25,955,321 | 1976 | 26,682,042 | 1975 | 26,728,800 | 1974 | 26,289,302 | 1973 | 25,498,691 | 1972 | 24,732,083 | 1971 | 24,252,132 | 1970 | 24,248,431 | 1969 | 24,622,258 | 1968 | 25,187,583 | 1967 | 25,621,185 | 1966 | 25,649,571 | 1965 | 25,203,165 | 1964 | 24,364,541 | 1963 | 23,322,833 | 1962 | 22,175,156 | 1961 | 21,133,962 | 1960 | 20,288,494 |
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