Year | Value | 2022 | 27,968,604 | 2021 | 27,667,935 | 2020 | 26,915,979 | 2019 | 25,849,235 | 2018 | 24,752,049 | 2017 | 23,584,181 | 2016 | 22,548,922 | 2015 | 22,114,837 | 2014 | 21,929,194 | 2013 | 21,480,265 | 2012 | 21,038,761 | 2011 | 20,745,519 | 2010 | 20,432,323 | 2009 | 20,000,494 | 2008 | 19,659,643 | 2007 | 19,359,912 | 2006 | 19,069,536 | 2005 | 18,862,362 | 2004 | 18,799,322 | 2003 | 18,710,464 | 2002 | 18,546,698 | 2001 | 18,310,517 | 2000 | 17,911,094 | 1999 | 17,357,962 | 1998 | 16,881,162 | 1997 | 16,488,177 | 1996 | 16,063,018 | 1995 | 15,740,390 | 1994 | 15,384,769 | 1993 | 14,648,344 | 1992 | 13,729,102 | 1991 | 12,937,896 | 1990 | 12,245,300 | 1989 | 11,913,465 | 1988 | 12,114,043 | 1987 | 12,587,658 | 1986 | 13,014,094 | 1985 | 13,289,967 | 1984 | 13,353,234 | 1983 | 13,250,157 | 1982 | 13,071,565 | 1981 | 12,831,338 | 1980 | 12,586,374 | 1979 | 12,319,929 | 1978 | 12,012,275 | 1977 | 11,744,345 | 1976 | 11,527,598 | 1975 | 11,308,760 | 1974 | 11,062,030 | 1973 | 10,815,346 | 1972 | 10,511,479 | 1971 | 10,171,585 | 1970 | 9,850,311 | 1969 | 9,580,410 | 1968 | 9,333,888 | 1967 | 9,088,895 | 1966 | 8,887,962 | 1965 | 8,733,885 | 1964 | 8,611,828 | 1963 | 8,531,733 | 1962 | 8,478,248 | 1961 | 8,381,410 | 1960 | 8,257,238 |
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