Year | Value | 2022 | 17,960,843 | 2021 | 17,977,378 | 2020 | 17,817,298 | 2019 | 17,750,912 | 2018 | 17,666,251 | 2017 | 17,553,000 | 2016 | 17,502,272 | 2015 | 17,441,470 | 2014 | 17,370,053 | 2013 | 17,286,199 | 2012 | 17,192,867 | 2011 | 17,060,975 | 2010 | 16,901,506 | 2009 | 16,746,064 | 2008 | 16,582,093 | 2007 | 16,409,883 | 2006 | 16,236,751 | 2005 | 16,072,958 | 2004 | 15,919,979 | 2003 | 15,764,135 | 2002 | 15,604,083 | 2001 | 15,445,566 | 2000 | 15,325,274 | 1999 | 15,235,802 | 1998 | 15,143,569 | 1997 | 15,049,503 | 1996 | 14,943,469 | 1995 | 14,822,356 | 1994 | 14,684,435 | 1993 | 14,529,834 | 1992 | 14,363,227 | 1991 | 14,191,042 | 1990 | 14,015,315 | 1989 | 13,838,653 | 1988 | 13,659,524 | 1987 | 13,472,350 | 1986 | 13,283,337 | 1985 | 13,097,071 | 1984 | 12,915,675 | 1983 | 12,739,082 | 1982 | 12,557,882 | 1981 | 12,360,368 | 1980 | 12,163,081 | 1979 | 11,963,928 | 1978 | 11,762,346 | 1977 | 11,568,087 | 1976 | 11,378,797 | 1975 | 11,190,303 | 1974 | 11,003,523 | 1973 | 10,812,881 | 1972 | 10,616,200 | 1971 | 10,415,157 | 1970 | 10,208,593 | 1969 | 9,998,346 | 1968 | 9,785,232 | 1967 | 9,568,761 | 1966 | 9,355,378 | 1965 | 9,147,097 | 1964 | 8,940,983 | 1963 | 8,738,385 | 1962 | 8,547,025 | 1961 | 8,359,890 | 1960 | 8,176,283 |
|