2020-2022. By that time our defense budget will be in excess of 50 Billion dollars / fiscal cycle (5 year term). My guess is that PAF will seek 36 units to begin with ( 18X2 = 36 = 2 Squadrons ) then depending on its utility might place another order. The best news is that PAF plans to integrate Link-16 and Sensor Fusion developed for J-20 into our JF-17 fleet. In other words they are looking at across the board network centric capabilities backed by our AWACs, AESA ground radars and a multi layered SAM system we are slowly building up. PAF is not focusing on building huge numbers but on having up to 400 advanced jets which are fully capable of fighting as a swarm in a network centric warfare setting. To give you an example the best feature of JAS-39 Gripen-D aka Gripen NG is its netcentricity. A small formation of Gripen -NGs can communicate and share data with each other which allows them to fight as a team against a larger enemy force.