Losses (prior to any deductibles being applied) have a distribution as reflected in the table below.
x F(x) E(X | x)
10,000 0.6 6000
15,000 0.7 7700
22,500 0.8 9500
32,500 0.9 11000
∞ 1.0 20000
There is a per-loss ordinary deductible of 10,000. The deductible is then raised so that half the number of losses exceed the new deductible as exceeded the old deductible. Determine the percentage change in the expected claim per payment when the deductible is raised.