Smart HUD - How are Smart HUD stats calculated?

Smart HUD stats are calculated as below:

VPIP (Voluntarily Put Money In the Pot)
(No. of times you put money in the preflop pot / total number of hands) x 100

PFR (Pre Flop Raise)
(Number of preflop raises / total number of hands) x 100

ATS (Attempt to Steal)
(Number of times a player has attempted to steal the blinds from that position / The number of times a player can attempt to steal the blinds from that position) x 100

3BET (Raise 3-Bet)
Number of times player 3bet preflop / number of times player could 3bet preflop x 100