Complex sentence: F-22 fleet was available for missions at a rate of 62% of the time on average in 2004,70% in 2009, and was predicted in 2014 to reach 85% as the fleet reached 100,000 flight hours.
Split into simpler sentences: F-22 aircraft was available for missions 62% of the time on average in 2004 and 70% in 2009. The percentage was predicted to reach 85% by 2014 as the fleet reached 100,000 flight hours.