Year 50N-90Nhydrol 50N-90Ncons 25N-50Nhydrol 25N-50Ncons 25S-25Nhydrol 25S-25Ncons 50S-25Shydrol 50S-25Scon 90S-50Shydrol 90S-50Scons 1961 0.81 0.83 3.68 3.15 3.50 2.10 6.68 6.13 1.88 1.57 1962 0.40 0.40 1.89 1.31 2.67 0.71 3.47 2.57 1.00 0.82 1963 0.46 0.41 2.16 1.42 3.13 0.78 3.84 2.78 1.27 1.20 1964 0.47 0.44 2.39 1.45 3.62 0.83 4.24 2.93 1.21 0.94 1965 0.54 0.49 2.86 1.57 4.16 0.92 4.69 3.09 1.28 0.98 1966 0.66 0.63 3.58 2.19 5.03 1.20 5.77 3.79 1.53 1.28 1967 0.93 0.88 5.24 3.09 6.39 1.64 7.52 5.19 1.99 1.69 1968 1.17 1.08 6.07 3.83 8.11 2.17 9.95 6.95 2.69 2.27 1969 1.40 1.34 7.24 4.48 10.08 2.62 12.23 8.86 2.75 3.82 1970 1.55 1.46 8.35 4.71 12.10 2.91 14.39 10.13 3.15 3.36 1971 1.70 1.60 9.47 5.58 14.08 3.11 16.33 10.64 3.88 3.42 1972 2.06 1.90 11.20 6.65 16.48 3.59 18.69 12.03 5.00 4.04 1973 2.55 2.31 13.86 8.01 19.80 4.55 22.40 14.96 4.96 4.55 1974 3.17 2.89 16.62 9.63 23.96 5.49 27.63 18.30 6.52 5.82 1975 3.47 3.18 18.32 10.10 27.85 5.98 32.07 21.34 7.75 7.66 1976 3.70 3.34 23.80 10.98 31.85 6.12 35.68 22.29 12.93 7.49 1977 4.51 4.08 24.49 13.79 36.91 7.44 41.11 25.42 12.05 8.70 1978 5.15 4.78 28.66 16.33 43.28 8.90 48.17 32.77 13.71 17.18 1979 5.56 5.19 31.68 17.73 49.48 9.53 54.62 35.70 14.37 13.53 1980 5.69 4.87 33.18 18.52 54.29 9.04 57.27 34.97 14.05 13.19 1981 6.06 4.89 34.92 15.25 58.69 9.09 62.23 34.85 20.66 14.09 1982 5.91 5.03 36.12 14.25 62.90 8.36 62.48 34.67 16.25 16.88 1983 5.71 4.61 40.21 13.39 64.54 7.82 60.75 31.72 13.33 14.04 1984 5.67 4.73 37.51 14.80 68.07 6.94 62.30 29.71 12.39 13.29 1985 6.07 4.82 39.45 15.97 70.53 7.25 64.39 31.48 12.39 13.41 1986 6.14 5.10 41.46 17.73 73.41 7.41 67.29 30.98 16.01 13.41 1987 6.03 4.77 41.51 14.68 76.48 6.98 67.74 31.02 13.81 14.11 1988 6.08 5.02 44.46 14.53 79.29 7.02 69.65 30.38 15.32 10.62 1989 6.67 5.16 47.38 15.77 82.72 7.39 73.01 31.48 15.34 10.70 1990 6.93 5.51 49.28 16.47 85.68 7.94 77.82 34.51 21.30 12.83 1991 6.58 5.20 49.13 14.36 89.56 7.29 79.10 33.77 18.45 15.16 1992 6.26 4.42 52.69 11.71 89.05 5.39 74.98 27.71 17.30 10.56 1993 4.71 3.31 40.77 6.06 86.50 2.74 68.72 21.80 16.71 10.04 1994 2.54 1.03 32.12 0.40 79.64 -2.26 54.49 7.52 12.30 6.67 1995 1.43 0.27 27.56 -0.70 71.70 -4.89 42.29 -2.92 14.25 9.87 1996 0.43 -0.87 21.87 -6.88 63.24 -6.88 31.95 -11.12 5.24 3.05 1997 -1.06 -2.24 15.62 -10.90 53.45 -9.97 19.28 -21.28 -0.05 -0.83 1998 -1.64 -2.60 13.30 -11.31 43.97 -11.15 9.03 -27.86 -3.09 -3.97 1999 -1.77 -2.73 9.62 -10.75 36.07 -11.28 3.68 -29.53 -4.25 -5.71 2000 -1.75 -2.65 7.46 -10.08 30.20 -11.06 0.91 -28.88 -4.86 -7.15 2001 -1.66 -2.39 6.08 -10.65 25.23 -10.84 -0.49 -27.34 -5.40 -6.50 2002 -1.65 -2.40 4.88 -10.26 20.88 -10.17 -1.45 -25.54 -5.05 -6.19 2003 -1.45 -2.10 4.23 -8.23 17.35 -9.71 -2.17 -24.00 -4.77 -5.88 2004 -1.29 -1.97 3.53 -7.49 14.53 -8.71 -2.32 -21.80 -4.40 -5.68 2005 -1.19 -1.78 2.75 -7.30 12.28 -8.16 -2.19 -20.42 -4.57 -7.07 2006 -1.03 -1.56 2.41 -6.32 10.42 -7.71 -2.21 -18.18 -4.21 -5.22 2007 -0.88 -1.44 2.05 -6.21 8.99 -7.10 -1.99 -16.48 -3.76 -5.25 2008 -0.85 -1.40 1.86 -5.59 7.72 -6.80 -1.70 -15.07 -3.30 -4.85 2009 -0.79 -1.19 1.61 -5.18 6.71 -6.34 -2.07 -14.22 -4.78 -6.38 2010 -0.65 -1.10 1.23 -5.47 5.94 -5.98 -1.22 -12.62 -2.93 -4.64 2011 -0.65 -1.24 1.09 -5.52 5.19 -5.60 -0.81 -11.35 -2.29 -4.47 2012 -0.65 -1.11 0.83 -4.03 4.38 -5.45 -1.16 -10.77 -2.16 -4.73 2013 -0.59 -1.03 0.72 -3.78 3.67 -4.97 -1.24 -10.26 -2.09 -4.69 2014 -0.58 -1.01 0.58 -3.48 3.21 -4.76 -1.49 -10.27 -2.79 -7.49 2015 -0.50 -1.06 0.56 -3.18 2.77 -4.41 -1.08 -8.99 -1.91 -4.15 2016 -0.47 -0.93 0.52 -3.19 2.44 -4.27 -0.91 -8.40 -1.92 -3.28 2017 -0.46 -0.90 0.48 -3.20 2.15 -4.03 -0.83 -7.45 -1.77 -2.96 2018 -0.38 -0.82 0.42 -2.61 1.92 -3.80 -1.02 -6.70 -2.44 -2.55 2019 -0.37 -0.77 0.23 -2.25 1.76 -3.65 -0.66 -6.96 -1.71 -4.59 2020 -0.39 -0.73 0.34 -2.12 1.61 -3.53 -0.48 -6.02 -1.66 -2.78