Year | Value | 2022 | 19,621,972 | 2021 | 19,000,988 | 2020 | 18,755,666 | 2019 | 18,513,673 | 2018 | 18,276,452 | 2017 | 18,037,776 | 2016 | 17,794,055 | 2015 | 17,542,806 | 2014 | 17,288,285 | 2013 | 17,035,551 | 2012 | 16,792,090 | 2011 | 16,557,202 | 2010 | 16,321,872 | 2009 | 16,092,822 | 2008 | 15,776,938 | 2007 | 15,484,192 | 2006 | 15,308,085 | 2005 | 15,147,029 | 2004 | 15,012,984 | 2003 | 14,909,019 | 2002 | 14,858,948 | 2001 | 14,858,335 | 2000 | 14,883,626 | 1999 | 14,928,374 | 1998 | 15,071,640 | 1997 | 15,334,405 | 1996 | 15,578,227 | 1995 | 15,816,243 | 1994 | 16,145,766 | 1993 | 16,380,672 | 1992 | 16,439,095 | 1991 | 16,451,711 | 1990 | 16,348,000 | 1989 | 16,249,500 | 1988 | 16,430,590 | 1987 | 16,072,478 | 1986 | 15,721,289 | 1985 | 15,413,315 | 1984 | 15,147,590 | 1983 | 14,885,966 | 1982 | 14,634,179 | 1981 | 14,397,391 | 1980 | 14,172,710 | 1979 | 13,957,795 | 1978 | 13,750,291 | 1977 | 13,543,521 | 1976 | 13,346,173 | 1975 | 13,158,942 | 1974 | 12,972,497 | 1973 | 12,789,985 | 1972 | 12,611,997 | 1971 | 12,444,338 | 1970 | 12,265,305 | 1969 | 12,042,478 | 1968 | 11,777,849 | 1967 | 11,491,228 | 1966 | 11,197,568 | 1965 | 10,897,644 | 1964 | 10,590,934 | 1963 | 10,277,790 | 1962 | 9,959,414 | 1961 | 9,639,302 | 1960 | 9,319,283 |
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