| Year | Value | | 2022 | 17,231,962 | | 2021 | 17,275,362 | | 2020 | 17,041,743 | | 2019 | 16,492,226 | | 2018 | 15,829,232 | | 2017 | 15,129,217 | | 2016 | 14,448,419 | | 2015 | 13,846,999 | | 2014 | 13,309,843 | | 2013 | 12,821,202 | | 2012 | 12,363,641 | | 2011 | 11,939,085 | | 2010 | 11,536,472 | | 2009 | 11,142,139 | | 2008 | 10,763,134 | | 2007 | 10,386,998 | | 2006 | 10,007,953 | | 2005 | 9,634,518 | | 2004 | 9,270,251 | | 2003 | 8,922,675 | | 2002 | 8,600,505 | | 2001 | 8,306,379 | | 2000 | 8,046,674 | | 1999 | 7,798,596 | | 1998 | 7,555,463 | | 1997 | 7,349,727 | | 1996 | 7,179,411 | | 1995 | 7,006,262 | | 1994 | 6,807,075 | | 1993 | 6,588,482 | | 1992 | 6,360,230 | | 1991 | 6,126,955 | | 1990 | 5,893,354 | | 1989 | 5,658,977 | | 1988 | 5,425,600 | | 1987 | 5,196,405 | | 1986 | 4,974,595 | | 1985 | 4,772,879 | | 1984 | 4,591,172 | | 1983 | 4,420,502 | | 1982 | 4,257,866 | | 1981 | 4,100,263 | | 1980 | 3,935,878 | | 1979 | 3,761,734 | | 1978 | 3,586,630 | | 1977 | 3,410,972 | | 1976 | 3,242,481 | | 1975 | 3,097,889 | | 1974 | 2,975,661 | | 1973 | 2,878,601 | | 1972 | 2,808,785 | | 1971 | 2,750,029 | | 1970 | 2,682,320 | | 1969 | 2,593,750 | | 1968 | 2,480,421 | | 1967 | 2,352,892 | | 1966 | 2,234,123 | | 1965 | 2,135,010 | | 1964 | 2,053,676 | | 1963 | 1,995,250 | | 1962 | 1,963,215 | | 1961 | 1,942,333 | | 1960 | 1,918,281 |
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