I was trying to fiqure out the mechanism for why Mars had so much higher harmful radiation. I think Gary provided one probably cause in his post above. Basically the Earth's atmosphere would "absorb" the radiation, whereas on Mars (and the Moon) the radiation wouldn't be absorb but be mostly reflected. The difference in size between Earth and Mars would have an effect on total amount of daytime while in orbit- but probably only around 10%.
Also what I was saying was there was no mention of GCR in term of the percentage of total radiation- they said 10% was from energy particles from sun, but the part which is cosmic was not mentioned- yet it would be part of the radiation dosage.