Misc: who searched for the holy grail?

Questions

More people are killed by ------------- annually than are killed in plane crashes.?

More redheads are born in ---------- than in any other country: 11 percent of its population has red hair.?

The highest known score for a single word in competition Scrabble is ---------?

More than 20 percent of men and 10 percent of women say they've forgotten their ----------------- at least once.?

Fleas can accelerate ------------- times faster than the space shuttle.?