Year | Value | 2022 | 9,588,890 | 2021 | 9,617,303 | 2020 | 9,634,283 | 2019 | 9,612,727 | 2018 | 9,564,386 | 2017 | 9,500,413 | 2016 | 9,443,539 | 2015 | 9,369,405 | 2014 | 9,283,086 | 2013 | 9,188,649 | 2012 | 9,110,771 | 2011 | 9,027,046 | 2010 | 8,951,455 | 2009 | 8,956,768 | 2008 | 8,960,824 | 2007 | 8,942,697 | 2006 | 8,947,521 | 2005 | 8,988,830 | 2004 | 9,134,717 | 2003 | 9,266,208 | 2002 | 9,386,489 | 2001 | 9,502,455 | 2000 | 9,579,783 | 1999 | 9,610,494 | 1998 | 9,653,050 | 1997 | 9,693,908 | 1996 | 9,714,056 | 1995 | 9,812,686 | 1994 | 10,065,774 | 1993 | 10,321,655 | 1992 | 10,578,257 | 1991 | 10,836,049 | 1990 | 11,212,890 | 1989 | 11,822,906 | 1988 | 12,445,873 | 1987 | 13,084,611 | 1986 | 13,732,808 | 1985 | 14,332,610 | 1984 | 14,828,582 | 1983 | 15,288,478 | 1982 | 15,706,552 | 1981 | 16,106,161 | 1980 | 16,499,970 | 1979 | 16,897,538 | 1978 | 17,289,379 | 1977 | 17,668,459 | 1976 | 18,024,996 | 1975 | 18,334,334 | 1974 | 18,532,955 | 1973 | 18,712,057 | 1972 | 18,866,224 | 1971 | 18,986,144 | 1970 | 19,117,521 | 1969 | 19,318,970 | 1968 | 19,475,621 | 1967 | 19,593,877 | 1966 | 19,619,691 | 1965 | 19,418,425 | 1964 | 19,204,966 | 1963 | 18,972,268 | 1962 | 18,702,026 | 1961 | 18,414,469 | 1960 | 18,081,445 |
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