he used to determine that

2007 9.083648 0.110088 4% Est. 1996 11.279482 0.088657 4% Est. 1992 9.448907 0.105832 4% Est. 1993 4.360980 0.229306 4% Est. 1999 16.218830 0.061657 4% Est. 1999 27.428180 0.036459 4% Est. 1995 23.796716 0.042023 4% Est. 1995 10.628735 0.094085 4% Est. 2006 33.622163 0.029742 4% Est. 2002 17.196559 0.058151 4% Est. 2000 23.369321 0.042791 4% Est. 2001 17.695263 0.056512 4% Est. 2002 18.403081 0.054339 4% Est. 2003 1.081600 0.924556 4% Est. 1989 8.571478 0.116666 3.8744% 1988 3.990107 0.250620 3.3218% 1987 8.041339 0.124357 3.1640% 1986 0.903174 1.107206 2.6144% 1985 13.862144 0.072139 2.9715% 1984 3.000025 0.333331 3.6576% 1983 2.340096 0.427333 3.8998% 1982 0.793652 1.259998 6.3831% 1981 11.058879 0.090425 9.6843% 1980 0.377670 2.647812 9.0330% 1979 2.519239 0.396945 8.8650% 1978 0.261517 3.823843 7.2813% 1977 1.874656 0.533431 6.6558% 1976 7.423555 0.134706 6.4073% 1975 7.059852 0.141646 9.8159% 1974 1.597616 0.625933 9.0909% 1973 3.256621 0.307067

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