Column Density	Sputtering Yield	Error
H2O cm^-2	H2O ion^-1	(+ / - ) H2O ion^-1
2.06E+17	10.94	0.5
4.13E+17	11	0.5
1.03E+18	10.99	0.5
2.06E+18	10.89	0.5
2.89E+18	10.75	0.5
4.13E+18	10.95	0.5
