Year | Value | 2022 | 32,763,605 | 2021 | 33,309,439 | 2020 | 33,518,901 | 2019 | 33,581,326 | 2018 | 33,770,820 | 2017 | 34,022,885 | 2016 | 34,367,948 | 2015 | 34,746,309 | 2014 | 35,081,206 | 2013 | 35,296,062 | 2012 | 35,355,145 | 2011 | 35,274,602 | 2010 | 35,229,097 | 2009 | 35,189,683 | 2008 | 35,195,005 | 2007 | 35,208,973 | 2006 | 35,288,892 | 2005 | 35,413,764 | 2004 | 35,518,617 | 2003 | 35,532,179 | 2002 | 35,474,987 | 2001 | 35,368,156 | 2000 | 35,240,675 | 1999 | 35,232,482 | 1998 | 35,473,449 | 1997 | 35,913,965 | 1996 | 36,529,884 | 1995 | 37,159,648 | 1994 | 37,659,438 | 1993 | 38,054,005 | 1992 | 38,340,616 | 1991 | 38,345,397 | 1990 | 38,259,436 | 1989 | 38,402,846 | 1988 | 38,650,729 | 1987 | 38,911,477 | 1986 | 39,218,280 | 1985 | 39,407,612 | 1984 | 39,279,215 | 1983 | 38,994,804 | 1982 | 38,663,713 | 1981 | 38,253,215 | 1980 | 37,740,623 | 1979 | 37,203,145 | 1978 | 36,661,217 | 1977 | 36,200,923 | 1976 | 35,997,551 | 1975 | 35,705,008 | 1974 | 35,273,316 | 1973 | 35,109,802 | 1972 | 35,051,455 | 1971 | 34,503,547 | 1970 | 33,283,581 | 1969 | 32,068,448 | 1968 | 30,928,014 | 1967 | 29,817,339 | 1966 | 28,965,828 | 1965 | 28,872,846 | 1964 | 29,034,474 | 1963 | 28,909,612 | 1962 | 28,753,718 | 1961 | 28,677,687 | 1960 | 28,412,017 |
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