According to GAMA’s Stats for the calendar year 2001, the single engine piston aircraft shipments were:
(edited: American Champion and Aviat were added. Sorry for the omission.)
#1 Cessna 821
#2 Piper 243
#3 Cirrus 183
#5 Beech 89
#6 Socata 63
#7 Maule 57 (Includes their turbine models if any)
#7 Aviat 57
#9 American Champ. 56
#10 Mooney 29 (only two aircraft delivered in 3rd and 4th quarters)
#11 Lancair 27
#12 Cmdr. 11
#13 Micco 10
Total deliveries: 1,644 so Cirrus had 11% of the market. For the fourth quarter, Piper delivered 59 aircraft and CD 53 or 14% of the market! That was one per day!
Congratulations Cirrus Design.
Since you asked, the Piper Meridian was the number one turbine/turboprop aircraft with 98 deliveries followed by the Cessna Citation Excel with 85. Overall, Cessna delivered 381 turbines followed by Beech/Raytheon with 228 and Gulfstream/Galaxy with 101.