I expect production to be increased to 2.3-2.5 mil/month some time this year.... though I cannot say when as I do not know when Nintendo will decide on an increase, nor how long it will take them to put it into effect.
Thus I take a random guess and have half the year at 1.8mil and half at 2.3-2.5mil.
making a tidy 24.6 - 25.8 million for the year. And an LTD of close to 45 million.