bj probability?

what is the probability that you will be delt a hand worthy of a double down according to basic strategy?

For 4-8 decks, double after split, surrender allowed:

Action	S17	H17
Hit	37.46%	37.10%
Stand	40.60%	39.42%
Double	9.65%	10.20%
Split	2.64%	2.59%
Surrender	4.92%	5.96%
Blackjack	4.73%	4.73%

For 4-8 decks, double after split, no surrender:

Action	S17	H17
Hit	42.38%	42.56%
Stand	40.60%	39.87%
Double	9.65%	10.20%
Split	2.64%	2.64%
Blackjack	4.73%	4.73%