Y X1 X2 X3 X4 X5
6.1 22.8 43.0 23.8  9.2  6
7.1 28.7 55.3 24.8 12.0 10
7.4 29.7 48.5 23.9 10.4  5
6.3 18.3 38.8 16.6  9.8  4
6.5 21.1 46.2 19.6  9.8  5
5.7 21.2 39.9 21.4  7.7  6
6.6 22.2 43.1 20.7 10.9  7
8.1 22.3 48.5 21.8  9.5  5
6.3 21.8 40.0 20.6 11.6  7
6.9 31.2 56.7 25.2 11.6  9