Year | Value | 2022 | 13,459,323 | 2021 | 13,378,729 | 2020 | 13,240,594 | 2019 | 13,178,647 | 2018 | 13,183,001 | 2017 | 13,280,308 | 2016 | 13,452,552 | 2015 | 13,696,926 | 2014 | 14,013,959 | 2013 | 14,369,299 | 2012 | 14,789,265 | 2011 | 15,316,818 | 2010 | 15,890,887 | 2009 | 16,507,142 | 2008 | 17,176,199 | 2007 | 17,853,566 | 2006 | 18,456,907 | 2005 | 18,877,322 | 2004 | 19,155,909 | 2003 | 19,334,453 | 2002 | 19,315,332 | 2001 | 19,081,023 | 2000 | 18,822,906 | 1999 | 18,573,317 | 1998 | 18,264,280 | 1997 | 17,991,423 | 1996 | 17,824,029 | 1995 | 17,689,496 | 1994 | 17,550,611 | 1993 | 17,393,727 | 1992 | 17,239,851 | 1991 | 17,059,539 | 1990 | 16,804,808 | 1989 | 16,525,232 | 1988 | 16,306,002 | 1987 | 16,114,067 | 1986 | 15,903,030 | 1985 | 15,778,156 | 1984 | 15,785,770 | 1983 | 15,882,759 | 1982 | 16,074,893 | 1981 | 16,396,071 | 1980 | 16,754,539 | 1979 | 17,030,290 | 1978 | 17,189,144 | 1977 | 17,260,708 | 1976 | 17,260,826 | 1975 | 17,221,207 | 1974 | 17,202,518 | 1973 | 17,148,244 | 1972 | 16,955,649 | 1971 | 16,694,204 | 1970 | 16,363,220 | 1969 | 15,993,604 | 1968 | 15,564,198 | 1967 | 15,035,320 | 1966 | 14,455,192 | 1965 | 13,519,407 | 1964 | 12,194,846 | 1963 | 10,895,992 | 1962 | 9,963,172 | 1961 | 9,668,803 | 1960 | 10,171,536 |
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