Year | Value | 2022 | 30,198,875 | 2021 | 30,312,143 | 2020 | 30,481,007 | 2019 | 30,638,263 | 2018 | 31,012,809 | 2017 | 31,109,769 | 2016 | 31,193,971 | 2015 | 31,278,411 | 2014 | 31,329,027 | 2013 | 31,056,458 | 2012 | 30,716,299 | 2011 | 30,643,856 | 2010 | 30,585,093 | 2009 | 30,481,038 | 2008 | 30,336,005 | 2007 | 30,129,102 | 2006 | 29,972,190 | 2005 | 29,883,545 | 2004 | 29,747,782 | 2003 | 29,571,065 | 2002 | 29,450,615 | 2001 | 29,410,285 | 2000 | 29,391,838 | 1999 | 29,373,779 | 1998 | 29,361,495 | 1997 | 29,345,460 | 1996 | 29,322,847 | 1995 | 29,306,546 | 1994 | 29,297,151 | 1993 | 29,283,105 | 1992 | 29,258,597 | 1991 | 29,231,307 | 1990 | 29,203,666 | 1989 | 29,172,721 | 1988 | 29,144,797 | 1987 | 29,124,921 | 1986 | 29,115,969 | 1985 | 29,108,423 | 1984 | 29,093,279 | 1983 | 29,080,183 | 1982 | 29,062,958 | 1981 | 29,032,477 | 1980 | 29,023,901 | 1979 | 28,989,355 | 1978 | 28,892,919 | 1977 | 28,778,223 | 1976 | 28,646,217 | 1975 | 28,495,494 | 1974 | 28,319,449 | 1973 | 28,130,000 | 1972 | 27,935,667 | 1971 | 27,778,782 | 1970 | 27,657,194 | 1969 | 27,518,285 | 1968 | 27,369,807 | 1967 | 27,206,380 | 1966 | 27,019,359 | 1965 | 26,819,950 | 1964 | 26,605,683 | 1963 | 26,397,441 | 1962 | 26,213,928 | 1961 | 26,037,590 | 1960 | 25,854,648 |
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