Year | Value | 2022 | 19,526,684 | 2021 | 19,716,558 | 2020 | 19,924,769 | 2019 | 20,124,610 | 2018 | 20,235,389 | 2017 | 20,364,088 | 2016 | 20,506,038 | 2015 | 20,641,074 | 2014 | 20,779,679 | 2013 | 20,916,991 | 2012 | 21,068,777 | 2011 | 21,226,473 | 2010 | 21,339,222 | 2009 | 21,438,147 | 2008 | 21,563,474 | 2007 | 21,711,831 | 2006 | 21,959,221 | 2005 | 22,095,436 | 2004 | 22,216,558 | 2003 | 22,332,350 | 2002 | 22,453,302 | 2001 | 22,553,961 | 2000 | 22,605,796 | 1999 | 22,605,917 | 1998 | 22,592,053 | 1997 | 22,562,961 | 1996 | 22,517,920 | 1995 | 22,463,140 | 1994 | 22,396,965 | 1993 | 22,313,930 | 1992 | 22,229,170 | 1991 | 22,141,746 | 1990 | 22,162,620 | 1989 | 22,442,037 | 1988 | 22,694,532 | 1987 | 22,928,806 | 1986 | 23,138,144 | 1985 | 23,384,016 | 1984 | 23,748,385 | 1983 | 24,071,886 | 1982 | 24,354,874 | 1981 | 24,655,017 | 1980 | 24,786,875 | 1979 | 24,463,546 | 1978 | 24,135,739 | 1977 | 23,793,441 | 1976 | 23,455,342 | 1975 | 23,174,931 | 1974 | 22,960,509 | 1973 | 22,718,829 | 1972 | 22,461,573 | 1971 | 22,199,572 | 1970 | 21,952,248 | 1969 | 21,735,619 | 1968 | 21,490,297 | 1967 | 21,216,547 | 1966 | 20,928,718 | 1965 | 20,635,974 | 1964 | 20,302,423 | 1963 | 19,943,813 | 1962 | 19,569,259 | 1961 | 19,195,318 | 1960 | 18,840,895 |
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