TWRoO on 03 January 2008
Why not just add the months, then you get an "about" figurs of what they produced.
Before launch :- 2m
1/2 Nov :- 0.5m
Dec - March :- 4m
April - July :- 4.8m
August - December :- 9m
Total = 20.3 by the end of December.
Of course various factors change that, like production is not static, (and is likely a bit above 1.8 now) and increases are not sudden, It will not have gone from 1.2m rate on 31st July up to 1.8m rate on 1st August for instance.... but it should give a vague idea that they have produced 20 million by now, even if it might be short of that on retail shipments and consumer sales.
Also I remember a period of Nintendo being about 1.5mil/month before the 1.8m announcement, but that could have been whilst they were increasing to 1.8.
