Year | Value | 2022 | 25,670,848 | 2021 | 26,245,459 | 2020 | 26,874,361 | 2019 | 27,370,985 | 2018 | 27,797,565 | 2017 | 28,121,872 | 2016 | 28,344,926 | 2015 | 28,493,855 | 2014 | 28,645,725 | 2013 | 28,805,363 | 2012 | 28,917,898 | 2011 | 28,936,206 | 2010 | 28,904,081 | 2009 | 28,775,370 | 2008 | 28,591,199 | 2007 | 28,350,636 | 2006 | 28,185,322 | 2005 | 28,172,376 | 2004 | 28,210,663 | 2003 | 28,210,932 | 2002 | 28,251,606 | 2001 | 28,349,123 | 2000 | 28,459,121 | 1999 | 28,591,011 | 1998 | 28,815,437 | 1997 | 29,126,876 | 1996 | 29,506,690 | 1995 | 29,910,349 | 1994 | 30,264,557 | 1993 | 30,501,881 | 1992 | 30,588,639 | 1991 | 30,602,818 | 1990 | 30,578,542 | 1989 | 30,533,695 | 1988 | 30,509,117 | 1987 | 30,561,963 | 1986 | 30,694,399 | 1985 | 30,891,152 | 1984 | 31,099,528 | 1983 | 31,238,191 | 1982 | 31,299,666 | 1981 | 31,333,151 | 1980 | 31,411,312 | 1979 | 31,623,468 | 1978 | 31,980,249 | 1977 | 32,479,410 | 1976 | 33,118,423 | 1975 | 33,779,922 | 1974 | 34,288,620 | 1973 | 34,668,085 | 1972 | 34,983,742 | 1971 | 35,127,570 | 1970 | 35,233,529 | 1969 | 35,652,441 | 1968 | 36,164,123 | 1967 | 36,608,269 | 1966 | 37,030,233 | 1965 | 37,322,162 | 1964 | 37,314,163 | 1963 | 37,136,604 | 1962 | 36,862,594 | 1961 | 36,514,624 | 1960 | 36,144,838 |
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