Original: At the end of the 2009 season, 820 World Championship Grands Prix will have been held including the Indianapolis 500 which was a part of the World Championship from 1950 until 1960.
Simplified: At the end of the 2008 season, 803 World Championship Grands Prix will have been held including the Indy 500 which was a part of the World Championship from 1950 until 1960.