Year | Value | 2022 | 14,162,504 | 2021 | 14,068,202 | 2020 | 13,924,399 | 2019 | 13,858,061 | 2018 | 13,852,088 | 2017 | 13,936,989 | 2016 | 14,099,288 | 2015 | 14,333,787 | 2014 | 14,643,236 | 2013 | 14,991,553 | 2012 | 15,399,089 | 2011 | 15,923,381 | 2010 | 16,472,617 | 2009 | 17,072,389 | 2008 | 17,745,812 | 2007 | 18,420,302 | 2006 | 19,031,014 | 2005 | 19,445,578 | 2004 | 19,716,270 | 2003 | 19,902,657 | 2002 | 19,885,244 | 2001 | 19,632,293 | 2000 | 19,355,921 | 1999 | 19,093,575 | 1998 | 18,759,552 | 1997 | 18,455,811 | 1996 | 18,274,496 | 1995 | 18,138,483 | 1994 | 17,994,917 | 1993 | 17,835,730 | 1992 | 17,694,458 | 1991 | 17,543,023 | 1990 | 17,351,258 | 1989 | 17,176,015 | 1988 | 17,010,566 | 1987 | 16,799,728 | 1986 | 16,562,234 | 1985 | 16,411,786 | 1984 | 16,392,612 | 1983 | 16,485,345 | 1982 | 16,709,999 | 1981 | 17,094,589 | 1980 | 17,548,006 | 1979 | 17,953,905 | 1978 | 18,183,033 | 1977 | 18,201,203 | 1976 | 18,091,740 | 1975 | 17,906,819 | 1974 | 17,703,946 | 1973 | 17,496,635 | 1972 | 17,241,906 | 1971 | 16,974,581 | 1970 | 16,762,132 | 1969 | 16,544,811 | 1968 | 16,166,744 | 1967 | 15,642,545 | 1966 | 15,033,233 | 1965 | 14,037,010 | 1964 | 12,637,125 | 1963 | 11,277,140 | 1962 | 10,282,089 | 1961 | 9,911,805 | 1960 | 10,339,232 |
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