1979,0.29,0.56,0.79,1.1,1.5,1.96,2.85,9.3 1980,0.29,0.55,0.79,1.11,1.52,1.98,2.9,9.1 1981,0.28,0.55,0.8,1.11,1.53,2,2.9,9.1 1982,0.26,0.53,0.79,1.11,1.56,2,2.88,9.6 1983,0.25,0.52,0.78,1.11,1.55,2,2.98,10.3 1984,0.25,0.52,0.77,1.1,1.54,2,2.93,10.9 1985,0.24,0.51,0.76,1.1,1.52,2,2.98,11.5 1986,0.23,0.48,0.74,1.06,1.48,1.96,3,14 1987,0.22,0.5,0.77,1.11,1.54,2.02,3.05,11.2 1988,0.22,0.49,0.75,1.08,1.5,1.98,3.03,13.3 1989,0.22,0.49,0.76,1.08,1.51,2,3.08,12.5 1990,0.23,0.5,0.76,1.08,1.51,2.02,3.05,12.1 1991,0.24,0.5,0.77,1.09,1.53,2.02,3.1,11.2 1992,0.22,0.49,0.76,1.08,1.51,2.04,3.1,12.3 1993,0.23,0.49,0.75,1.08,1.52,2.04,3.13,11.9 1994,0.22,0.49,0.76,1.08,1.52,2.02,3.1,12.1 1995,0.23,0.49,0.75,1.07,1.5,2.02,3.15,12.5 1996,0.22,0.47,0.73,1.05,1.5,2,3.18,13.8 1997,0.22,0.46,0.71,1.02,1.48,2,3.23,14.9 1998,0.22,0.45,0.71,1.01,1.46,1.98,3.2,15.7 1999,0.21,0.45,0.69,1,1.44,1.96,3.23,16.7 2000,0.2,0.43,0.68,0.98,1.42,1.98,3.23,17.8 2001,0.22,0.46,0.71,1.04,1.48,2.02,3.18,14.7 2002,0.22,0.47,0.73,1.06,1.5,2.04,3.2,13.5 2003,0.21,0.46,0.72,1.05,1.49,2.04,3.18,14.3 2004,0.21,0.45,0.7,1.02,1.47,1.96,3.18,16.3 2005,0.2,0.43,0.67,0.99,1.42,1.96,3.25,18.1 2006,0.2,0.42,0.66,0.98,1.41,1.94,3.28,18.8