Four (?!) sets of panda twins

For some reason panda news is harder to come by than you'd think. I've been hearing snippets of panda births on the news and am having trouble coming up with a good count. Piecing together the various news stories, I think that four sets of twin panda have been born in the last week -- on Sunday, Monday, Thursday and Saturday. That makes ten baby pandas born in Chinese breeding centers this year. Does that sound right? The latest news story is here. I also found some more panda information on China.org.