1956,0.437,0.572,0.037,42,753
1978,0.477,0.494,0.053,61,828
1999,0.508,,,94,930
1956,0.376,0.465,0.084,27,952
1978,0.429,0.458,0.071,37,187
1999,0.506,,,52,761
1956,0.410,0.361,0.008,14,801
1978,0.423,0.358,0.041,24,641
1999,0.459,,,42,169