According to business aviation consultant Brian Foley, pent-up demand for business jets in the U.S. and European markets is helping aircraft manufacturers keep production lines humming. Deliveries for the first half of 2012, reported by Amstat, showed a 20-percent increase in the U.S., compared with the same period last year, and a 34-percent increase in Europe, he noted. The pent-up demand, building since 2008, “[is] finally starting to manifest itself as real buyer action as confidence improves, just in time to reinforce the recovery and keep it from faltering.”