Production wise... they had 2 million for the launch, and I believe it was at 1 million per month at launch (so the 500k for December may be wrong)
they increased to 1.5 million in June or July i think, and 1.8 million in August
(I vaguely remember some time they were at 1.3 million p/month, but i am not sure)
So for the 13 months (assuming Nintendo are using calender months...but they may be using 4 weeks as a base month) they produced at least 19.5 million.
2 million (at launch)
+7 million (December 2006 through June 2007)
+1.5 million (July)
+9 million (August through December)
(If they did have a period f 1.3 million, or are using lunar months instead, then they will have produced even more)
Of course not all of the total will get to retail or to consumers, so i guess take 500k off... that is still 19 million
