(ShareCast News) - Passenger numbers grew at easyJet in April, by 6.1% to 6.37 million, the Luton-based low-cost carrier reported on Friday morning.Load factor - the ratio of passenger-kilometres travelled to seat-kilometres available - was down 0.4 percentage points over April last year, however, to 90.4%.On a rolling 12 months basis, the FTSE 100 firm flew 71.13 million passengers - a 7.4% improvement on a year ago.Load factor was also up on a rolling 12 months to the end of April, by 0.5 percentage points to 91.5%.