In terms of deliveries, as of October 2019, Boeing had shipped 10,563 aircraft of the 737 series since the first delivery to Lufthansa in late 1967, with a further 4,573 on firm order. Airbus had shipped 9,086 A320 family aircraft since the first delivery to Air France in early 1988, with another 6,107 on firm order and for comparison, Boeing delivered 9,037 aircraft within the same time frame. To date, with its 21 years ahead of introduction, the 737 series aircraft had been delivered nearly 1,500 more than the A320 family and within the same time frame, the last had 49, slightly more deliveries than its competitor. To increase delivery, Boeing ramped up 737 monthly production from 47 in 2017 to 57 in 2019, whilst Airbus from 46 to 60 and both consider accelerating further despite supplier strain.