series,x,y
"Stage efficiencies 0.8, 0.5, 0.1, 0.5",1,0.8
"Stage efficiencies 0.8, 0.5, 0.1, 0.5",2,0.4
"Stage efficiencies 0.8, 0.5, 0.1, 0.5",3,0.04
"Stage efficiencies 0.8, 0.5, 0.1, 0.5",4,0.02
Third-stage efficiency doubled,1,0.8
Third-stage efficiency doubled,2,0.4
Third-stage efficiency doubled,3,0.08
Third-stage efficiency doubled,4,0.04