I've tried posting this link in the resources section, but it's a "restricted posting" area, so a Mod will need to do it, but here's a useful site that gives total production numbers and UK sales for most models since the 80s.

Unfortunately it doesn't list every model but it's quite useful anyway, and as it's the Ferrari UK site, it should be accurate.

http://www.ferrari.co.uk/index.php?page=productioncars

Click "Ferrari approved" on left hand list, then "past models" on right hand list