Year | Value | 2022 | 25,742,884 | 2021 | 25,720,321 | 2020 | 25,740,048 | 2019 | 25,781,037 | 2018 | 25,777,658 | 2017 | 25,724,696 | 2016 | 25,603,930 | 2015 | 25,341,148 | 2014 | 24,902,123 | 2013 | 24,329,700 | 2012 | 23,697,896 | 2011 | 23,064,683 | 2010 | 22,421,756 | 2009 | 21,799,612 | 2008 | 21,227,458 | 2007 | 20,723,947 | 2006 | 20,329,253 | 2005 | 19,996,651 | 2004 | 19,691,980 | 2003 | 19,427,919 | 2002 | 19,199,902 | 2001 | 18,999,654 | 2000 | 18,835,747 | 1999 | 18,718,627 | 1998 | 18,640,937 | 1997 | 18,586,919 | 1996 | 18,532,084 | 1995 | 18,433,081 | 1994 | 18,283,147 | 1993 | 18,098,380 | 1992 | 17,957,723 | 1991 | 17,901,296 | 1990 | 17,877,395 | 1989 | 17,594,725 | 1988 | 17,410,666 | 1987 | 17,168,420 | 1986 | 16,826,860 | 1985 | 16,448,042 | 1984 | 16,057,144 | 1983 | 15,632,930 | 1982 | 15,183,932 | 1981 | 14,743,127 | 1980 | 14,309,381 | 1979 | 13,848,716 | 1978 | 13,416,842 | 1977 | 13,039,639 | 1976 | 12,634,849 | 1975 | 12,211,786 | 1974 | 11,851,680 | 1973 | 11,548,952 | 1972 | 11,261,437 | 1971 | 10,980,661 | 1970 | 10,707,711 | 1969 | 10,446,425 | 1968 | 10,195,491 | 1967 | 9,946,516 | 1966 | 9,684,416 | 1965 | 9,407,141 | 1964 | 9,122,604 | 1963 | 8,834,777 | 1962 | 8,555,359 | 1961 | 8,315,498 | 1960 | 8,115,639 |
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