Rounding in line chart

Jul 1, 2010 at 5:49 PM

I have datapoints that go from 0 - 0.026, but the chart refuses to show tick marks below the hundredth place so the chart actually looks like the values go to above 0.03 (rounded 0.026-->0.03)

Is there anyway to get the tick marks in the dependent axis to go to the thousandth place?