A very interesting question! Do you mean the total films produced by studio, or otherwise. I would think that there would be some sort of yearly publication that could offer some of this sort of information. Perhaps some periodical such as 'Variety' has and does publish some of these yearly totals.
IM CURIOUS AS TO WEATHER MORE MOVIES MADE IN THE 30S-40S AS COMPARED TO THE PRESENT DAY TOTALS IM WAS THINKING MORE IN THE 30S AND 40S CONSIDERING A AND B MOVIES BUT CANT FIND ANY NUMBERS