"C1","C2","C3","C4"
1973,1974,1975,1976
2.8,3.6,1.4,2
5.9,1.7,.9,2.2
3.3,5.1,1.1,.9
4.4,2.2,3.2,1.1
1.7,2.1,.8,.5
3.8,4.1,1.5,1.2
6.6,4.7,2.8,1.4
3.1,2.7,1.4,3.5
0,1.3,.5,1.2