The single aisle airplane war in numbers between Airbus and Boeing show a status quo relationship with year over year orders, has become a dog fight. The lower flat lines in the graphs below demonstrate the year to year dual in figure 2.
Figure 1 is a blow by blow count of orders taken since Airbus order announcements during 2010. Boeing started its order announcements in 2011.
The top two graph lines (in Fig. 2) below depict the market share growth between the NEO and the Max. A gradual widening between Airbus and Boeing continues for single aisle NEO/Max units ordered, even though the orders made for both are in a dead heat for orders taken during 2016. The bottom two lines below show a market dogfight.
Market share percentages found in fig.3 below maintains about a sixty-forty split with Airbus having the lead. If taking the A-321 out of the data it would be a fifty-fifty market in the single aisle division. Boeing has failed to stem the A-321 market with its 737-Max-900 offering.