A full 62% of our F18's can fly due to lack of parts and lack of readiness.
http://breakingdefense.com/2017/02/62-of-f-18-hornets-unfit-to-fly-dod-hill-focus-on-readiness/
http://breakingdefense.com/2017/02/62-of-f-18-hornets-unfit-to-fly-dod-hill-focus-on-readiness/