Folks like me couldn't travel in 2020, and didn't much in 2021, which meant we weren't spending money on travel. That money accumulated, in effect, and now folks are traveling, which increases demand, a lot, air lines are full, folks are driving a lot, and the economy snapped back quickly last year, we had very high GDP growth, much of which is dependent on petroleum. The stimulus monies were just added to all that, free money, let's hit the road.