| Year | Value | | 2022 | 38,000,000 | | 2021 | 43,822,901 | | 2020 | 44,132,049 | | 2019 | 44,386,203 | | 2018 | 44,622,518 | | 2017 | 44,831,135 | | 2016 | 45,004,673 | | 2015 | 45,154,036 | | 2014 | 45,272,155 | | 2013 | 45,489,648 | | 2012 | 45,593,342 | | 2011 | 45,706,086 | | 2010 | 45,870,741 | | 2009 | 46,053,331 | | 2008 | 46,258,189 | | 2007 | 46,509,355 | | 2006 | 46,787,786 | | 2005 | 47,105,171 | | 2004 | 47,451,626 | | 2003 | 47,812,949 | | 2002 | 48,202,470 | | 2001 | 48,662,400 | | 2000 | 49,176,500 | | 1999 | 49,674,000 | | 1998 | 50,144,500 | | 1997 | 50,594,600 | | 1996 | 51,057,800 | | 1995 | 51,512,800 | | 1994 | 51,921,400 | | 1993 | 52,179,200 | | 1992 | 52,150,400 | | 1991 | 52,000,500 | | 1990 | 51,891,400 | | 1989 | 51,773,000 | | 1988 | 51,521,000 | | 1987 | 51,293,000 | | 1986 | 51,097,000 | | 1985 | 50,917,000 | | 1984 | 50,754,000 | | 1983 | 50,564,000 | | 1982 | 50,384,000 | | 1981 | 50,221,000 | | 1980 | 49,973,920 | | 1979 | 49,739,734 | | 1978 | 49,536,615 | | 1977 | 49,357,430 | | 1976 | 49,144,535 | | 1975 | 48,892,187 | | 1974 | 48,602,694 | | 1973 | 48,301,548 | | 1972 | 47,974,187 | | 1971 | 47,597,756 | | 1970 | 47,279,086 | | 1969 | 46,990,889 | | 1968 | 46,635,196 | | 1967 | 46,235,370 | | 1966 | 45,809,120 | | 1965 | 45,387,091 | | 1964 | 44,941,406 | | 1963 | 44,445,903 | | 1962 | 43,924,755 | | 1961 | 43,365,219 | | 1960 | 42,767,251 |
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