I can't say for sure as I bought them 2nd hand about two years ago. I don't normally run them until LVC. I race once a week most weeks and cycle them twice per race meet. 3x 5min heats and 1x 10min final, heats use roughly 1000-1200ma and finals approx 2000-2400ma. I always charge my batteries the next day but don't use them again until the next weeks racing. As for what voltage when I put them on charge, I think roughly 7.8v after each heat, not sure after the final. I do usually use the 'Team Orion' pack for finals though!
Cheers
Two years of weekly use is the outer limit of a pack's peak performance, especially for the earlier gen lipos. That they're dropping off after what has been at least 200 cycles is not unexpected.