UnScramble this Word: l e a b t g o?

Questions

40,000 Americans are injured by ---------- every year.?

A flush toilet exists today that dates back to ---------- B.C.?

About a third of Americans ---------- while they are still sitting on the toilet.?

In true kingly fashion, Elvis passed away while sitting on the---------- .?

---------- gallons of water are flushed down toilets in the U.S. every day.?