Out of the 62,999 recorded professional games on Kyokumenpedia (局面ペヂィア) as of 2017 April 25, 77.6% started with a bishop pawn opening (P-7f) and 20.5% started with a rook pawn opening (P-2f).
A less common first move (1.5% of Kyokumenpedia games) is the king's pawn (P-5f).