"Year","After 1 year","After 3 years","After 5 years","After 10 years"
1978,64.78454,51.26984,42.41379,32.27273
1979,65.48296,49.53846,42.32715,34.10138
1980,65.07937,50,44.61280,32.20721
1981,64.1643,50.92025,44.7541,32.81597
1982,64.57143,55.45171,44.46367,35.10393
1983,65.56671,56.09756,48.30509,34.64052
1984,67.30245,52.44445,43.85113,33.04904
1985,66.44474,50.81241,44.67742,34.58333
1986,60.82337,49.71181,45.13557,34.375
1987,59.29319,51.52778,44.66165,31.02804
1988,62.10393,51.15962,43.63905,30.45187
1989,63.93443,55.05465,46.59607,31.569
1990,65.38937,54.48461,50.95448,30.09524
1991,64.69849,54.75544,44.54277,30.78431
1992,68.53933,58.54644,47.45269,36.38132
1993,66.41883,56.58602,46.02699,36.59004
1994,67.23716,52.04756,43.6865,34.64286
1995,66.66667,51.97368,39.97114,
1996,67.13287,51.87581,45.46784,
1997,63.3526,50.31605,46.71533,
1998,62.7933,52.27273,45.85091,
1999,62.62404,51.13924,46.14379,
2000,61.43791,50.54811,,
2001,65.20763,52.83688,,
2002,66.59412,,,
2003,66.63008,,,