Some numbers:
the most produced italian fighter was (sigh!) the CR.42, with 1.781 exemplars. The C.200 was produced in 1151 units, G.50 in 780 units.
For the second generation fighters the numbers are: C.202 --> 1100, Re.2001 --> 237
Third generation: C.205 --> 280, G.55 --> 270, Re.2005 --> 30
Keep in mind that different sources give different figures, I just wanted to give you an idea of how many fighters were produced during the war (I've not listed the Re.2000 and Re.2002)