Year | Value | 2022 | 12,578,267 | 2021 | 12,538,552 | 2020 | 12,392,231 | 2019 | 12,313,243 | 2018 | 12,281,202 | 2017 | 12,330,273 | 2016 | 12,453,525 | 2015 | 12,651,622 | 2014 | 12,920,379 | 2013 | 13,221,509 | 2012 | 13,577,360 | 2011 | 14,039,232 | 2010 | 14,511,438 | 2009 | 15,018,963 | 2008 | 15,597,294 | 2007 | 16,166,527 | 2006 | 16,677,331 | 2005 | 17,006,561 | 2004 | 17,204,164 | 2003 | 17,332,155 | 2002 | 17,269,166 | 2001 | 16,982,724 | 2000 | 16,668,892 | 1999 | 16,366,426 | 1998 | 16,024,978 | 1997 | 15,712,575 | 1996 | 15,516,800 | 1995 | 15,370,959 | 1994 | 15,231,047 | 1993 | 15,096,711 | 1992 | 14,997,947 | 1991 | 14,897,028 | 1990 | 14,759,219 | 1989 | 14,630,381 | 1988 | 14,483,735 | 1987 | 14,259,747 | 1986 | 14,042,564 | 1985 | 13,959,842 | 1984 | 14,010,910 | 1983 | 14,176,930 | 1982 | 14,474,516 | 1981 | 14,872,463 | 1980 | 15,276,674 | 1979 | 15,625,549 | 1978 | 15,796,684 | 1977 | 15,747,382 | 1976 | 15,529,152 | 1975 | 15,216,403 | 1974 | 14,918,991 | 1973 | 14,652,805 | 1972 | 14,365,894 | 1971 | 14,091,524 | 1970 | 13,891,670 | 1969 | 13,708,210 | 1968 | 13,383,289 | 1967 | 12,937,528 | 1966 | 12,438,703 | 1965 | 11,596,696 | 1964 | 10,376,382 | 1963 | 9,189,377 | 1962 | 8,347,677 | 1961 | 8,076,864 | 1960 | 8,514,880 |
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