Here are some numbers for various missions:
Mission.............Dose Gemini 3 23 millirads Gemini 4 46 millirads Gemini 5 176 millirads Gemini 7 164 millirads Skylab 2500 millirads Apollo 11 173 milliradsFor orbits at 250 - 300 km at 65 degree inclinations to the equator you get about 10 millirads/day. These numbers are from Volume II of the "Foundations of Space Biology and Medicine" NASA SP-374 published in 1975. Passes through the Van Allen radiation belts give you 10 - 20 rads/hour but most manned flights avoid them, and passages through them last about 10 - 20 minutes.