Operating leases of jet airliner accounted for less than 2% of the fleet in 1976, then 15% in the early 1990s, 25% in 2000 and 40% in 2017, with lessors involved in 62% of second hand mid-life aircraft transactions since 2000: 42% in Europe and 29% in North America.[1] In 2015, over $120 billion of commercial aircraft were delivered worldwide and half of the global lessors were based in Ireland.[2]