Year | Value | 2022 | 28,301,696 | 2021 | 28,199,867 | 2020 | 28,490,453 | 2019 | 28,971,683 | 2018 | 29,825,653 | 2017 | 30,563,433 | 2016 | 30,741,464 | 2015 | 30,529,716 | 2014 | 30,193,258 | 2013 | 29,838,021 | 2012 | 29,470,426 | 2011 | 29,096,159 | 2010 | 28,715,022 | 2009 | 28,327,892 | 2008 | 27,933,833 | 2007 | 27,525,097 | 2006 | 27,102,081 | 2005 | 26,668,785 | 2004 | 26,226,927 | 2003 | 25,782,029 | 2002 | 25,330,929 | 2001 | 24,880,203 | 2000 | 24,427,729 | 1999 | 23,966,960 | 1998 | 23,503,819 | 1997 | 23,037,561 | 1996 | 22,572,110 | 1995 | 22,107,286 | 1994 | 21,640,833 | 1993 | 21,172,100 | 1992 | 20,700,461 | 1991 | 20,226,214 | 1990 | 19,750,579 | 1989 | 19,275,292 | 1988 | 18,800,770 | 1987 | 18,328,655 | 1986 | 17,860,872 | 1985 | 17,402,304 | 1984 | 16,953,234 | 1983 | 16,509,596 | 1982 | 16,071,654 | 1981 | 15,638,426 | 1980 | 15,210,443 | 1979 | 14,788,523 | 1978 | 14,372,959 | 1977 | 13,965,250 | 1976 | 13,566,112 | 1975 | 13,176,387 | 1974 | 12,796,220 | 1973 | 12,424,804 | 1972 | 12,061,621 | 1971 | 11,705,674 | 1970 | 11,355,475 | 1969 | 11,011,335 | 1968 | 10,672,654 | 1967 | 10,338,848 | 1966 | 10,010,685 | 1965 | 9,688,138 | 1964 | 9,371,333 | 1963 | 9,059,953 | 1962 | 8,754,082 | 1961 | 8,453,106 | 1960 | 8,156,937 |
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