| Year | Value | | 2021 | 10,466,856.911 | | 2020 | 10,391,616.478 | | 2019 | 10,482,565.154 | | 2018 | 10,439,964.679 | | 2017 | 10,581,015.328 | | 2016 | 10,284,170.011 | | 2015 | 10,339,992.645 | | 2014 | 10,604,915.188 | | 2013 | 10,590,344.761 | | 2012 | 10,741,058.313 | | 2011 | 10,856,652.626 | | 2010 | 10,697,737.707 | | 2009 | 10,813,732.283 | | 2008 | 10,903,400.573 | | 2007 | 11,017,631.886 | | 2006 | 11,147,684.787 | | 2005 | 11,180,594.031 | | 2004 | 11,031,376.559 | | 2003 | 11,482,326.989 | | 2002 | 11,573,851.101 | | 2001 | 11,687,868.067 | | 2000 | 11,695,250.089 | | 1999 | 11,698,387.33 | | 1998 | 11,815,155.441 | | 1997 | 11,812,255.818 | | 1996 | 11,863,950.42 | | 1995 | 11,889,273.218 | | 1994 | 11,967,340.422 | | 1993 | 11,901,830.921 | | 1992 | 11,999,062.327 | | 1991 | 11,994,180.437 | | 1990 | 12,032,847.303 | | 1989 | 12,067,141.266 | | 1988 | 12,118,381.041 | | 1987 | 12,112,382.958 | | 1986 | 12,131,818.937 | | 1985 | 12,316,757.524 | | 1984 | 12,319,592.562 | | 1983 | 12,297,719.05 | | 1982 | 12,379,649.394 | | 1981 | 12,402,380.882 | | 1980 | 12,404,655.566 | | 1979 | 12,389,229.287 | | 1978 | 12,428,130 | | 1977 | 12,406,766 | | 1976 | 12,504,563.9 | | 1975 | 12,492,577 | | 1974 | 12,499,158 | | 1973 | 12,490,816.5 | | 1972 | 12,525,151 | | 1971 | 12,530,115.667 | | 1970 | 12,503,646.985 | | 1969 | 12,707,272.189 | | 1968 | 12,740,297.611 | | 1967 | 12,506,231.639 | | 1966 | 12,484,657.257 | | 1965 | 12,485,147.91 | | 1964 | 12,477,711.096 | | 1963 | 12,471,019.782 | | 1962 | 12,468,227.315 | | 1961 | 12,477,707.445 |
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