I was in the 82nd percentile.
Missed # 11. The answer to # 6 changed recently - China only began to exceed Japan as of August 2008 - so I think that one would be easy to miss. Only answered # 8 correctly because I, out of boredom, have been hitting refresh on finance.google.com's entry for the DOW. It's gotten fairly boring, as of late (past few months), though - seems to be pegged at 8,500 (ie. 2,000 above it's lowest point)