Date Value Value
Dec 31, 2012 121.08 million
Dec 31, 2011 119.93 million
Dec 31, 2010 117.54 million
Dec 31, 2009 117.18 million
Dec 31, 2008 116.78 million
Dec 31, 2007 116.01 million
Dec 31, 2006 114.38 million
Dec 31, 2005 113.34 million
Dec 31, 2004 112.00 million
Dec 31, 2003 111.28 million
Dec 31, 2002 109.30 million
Dec 31, 2001 108.21 million
Dec 31, 2000 104.71 million
Dec 31, 1999 103.87 million
Dec 31, 1998 102.53 million
Dec 31, 1997 101.02 million
Dec 31, 1996 99.63 million
Dec 31, 1995 98.99 million
Dec 31, 1994 97.11 million
Dec 31, 1993 96.43 million
Dec 31, 1992 95.67 million
Dec 31, 1991 94.31 million
Dec 31, 1990 93.35 million
Dec 31, 1989 92.83 million
Dec 31, 1988 91.12 million
Dec 31, 1987 89.48 million
Dec 31, 1986 88.46 million
Dec 31, 1985 86.79 million
Dec 31, 1984 85.29 million
Dec 31, 1983 83.92 million
Dec 31, 1982 83.53 million
Dec 31, 1981 82.37 million
Dec 31, 1980 80.78 million
Dec 31, 1979 77.33 million
Dec 31, 1978 76.03 million
Dec 31, 1977 74.14 million
Dec 31, 1976 72.87 million
Dec 31, 1975 71.12 million
Dec 31, 1974 69.86 million
Dec 31, 1973 68.25 million
Dec 31, 1972 66.68 million
Dec 31, 1971 64.78 million
Dec 31, 1970 63.40 million
Dec 31, 1969 62.21 million
Dec 31, 1968 60.81 million
Dec 31, 1967 59.24 million
Dec 31, 1966 58.41 million
Dec 31, 1965 57.44 million
Dec 31, 1964 56.15 million
Dec 31, 1963 55.27 million
Dec 31, 1962 54.76 million
Dec 31, 1961 53.56 million
Dec 31, 1960 52.80 million
Dec 31, 1959 51.44 million
Dec 31, 1958 50.47 million
Dec 31, 1957 49.67 million
Dec 31, 1956 48.90 million
Dec 31, 1955 47.87 million
Dec 31, 1954 46.96 million
Dec 31, 1953 46.39 million
Dec 31, 1952 45.54 million
Dec 31, 1951 44.67 million
Dec 31, 1950 43.55 million
Dec 31, 1949 42.18 million
Dec 31, 1948 40.53 million
Dec 31, 1947 39.11 million
Dec 31, 1940 34.95 million