Year | Value | 2022 | 18,995,573 | 2021 | 19,493,868 | 2020 | 19,564,918 | 2019 | 19,595,179 | 2018 | 19,599,212 | 2017 | 19,598,693 | 2016 | 19,594,548 | 2015 | 19,600,554 | 2014 | 19,611,835 | 2013 | 19,624,797 | 2012 | 19,634,196 | 2011 | 19,631,168 | 2010 | 19,617,883 | 2009 | 19,671,857 | 2008 | 19,654,617 | 2007 | 19,644,001 | 2006 | 19,644,068 | 2005 | 19,647,126 | 2004 | 19,648,406 | 2003 | 19,653,302 | 2002 | 19,660,224 | 2001 | 19,662,876 | 2000 | 19,684,019 | 1999 | 19,903,175 | 1998 | 19,893,561 | 1997 | 19,877,592 | 1996 | 19,856,865 | 1995 | 19,833,831 | 1994 | 19,798,400 | 1993 | 19,748,921 | 1992 | 19,690,124 | 1991 | 19,619,741 | 1990 | 19,541,082 | 1989 | 19,457,007 | 1988 | 19,377,690 | 1987 | 19,291,780 | 1986 | 19,183,076 | 1985 | 19,054,503 | 1984 | 18,905,751 | 1983 | 18,739,715 | 1982 | 18,569,228 | 1981 | 18,401,741 | 1980 | 18,236,790 | 1979 | 18,070,423 | 1978 | 17,925,888 | 1977 | 17,784,309 | 1976 | 17,616,891 | 1975 | 17,448,865 | 1974 | 17,285,800 | 1973 | 17,129,152 | 1972 | 16,981,939 | 1971 | 16,849,076 | 1970 | 16,790,316 | 1969 | 16,731,190 | 1968 | 16,603,401 | 1967 | 16,449,431 | 1966 | 16,296,932 | 1965 | 16,182,196 | 1964 | 16,033,108 | 1963 | 15,821,615 | 1962 | 15,623,435 | 1961 | 15,456,497 | 1960 | 15,299,544 |
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