fix bug where an exception would be thrown when trying to print percentile stats
fix bug where an exception would be thrown when trying to print percentile stats

kentzzhang/locust,rackerlabs/locust,minhoryang/locust,harrisonfeng/locust,kentzzhang/locust,nagyistoce/locust,fordhurley/locust,leo23/locust,RollForReflex/locust,locustio/locust,yangchaogit/locust,lixar/locust,timaakulich/locust,Diogo-Costa/locust,liubq919/locust,normanb/locust,TZer0/locust,cloudant/locust,noif/locust,locustio/locust,donglei/locust,mbeacom/locust,edx/locust,noif/locust,pan1cz/locust,leo23/locust,noif/locust,pan1cz/locust,leo23/locust,rohitgup14/locust,TZer0/locust,wndhydrnt/locust,nagyistoce/locust,minhoryang/locust,RollForReflex/locust,locustio/locust,yangchaogit/locust,cloudant/locust,lixar/locust,locustio/locust,ismail-s/locust,moongtaeng/locust,lixar/locust,fengshao0907/locust,armersong/locust,pglass/locust,mbeacom/locust,normanb/locust,pglass/locust,liubq919/locust,bugsduggan/locust,dmoliveira/locust,rohitgup14/locust,rackerlabs/locust,doctoryes/locust,edx/locust,jaume-pinyol/locust,kyroskoh/locust,cpennington/locust,normanb/locust,liubq919/locust,timaakulich/locust,cgoldberg/locust,pmdarrow/locust,yangchaogit/locust,pan1cz/locust,jacobgardner/locust,agoragames/locust,armersong/locust,mbeacom/locust,dmoliveira/locust,cgoldberg/locust,pglass/locust,RollForReflex/locust,doctoryes/locust,yangchaogit/locust,fengshao0907/locust,leo23/locust,rohitgup14/locust,harrisonfeng/locust,pmdarrow/locust,RollForReflex/locust,Diogo-Costa/locust,mbeacom/locust,edx/locust,pmdarrow/locust,santiavenda2/locust,doctoryes/locust,harrisonfeng/locust,moongtaeng/locust,timaakulich/locust,agoragames/locust,dmoliveira/locust,armersong/locust,minhoryang/locust,donglei/locust,ismail-s/locust,scalp42/locust,cpennington/locust,armersong/locust,kyroskoh/locust,scalp42/locust,fengshao0907/locust,edx/locust,cgoldberg/locust,bugsduggan/locust,santiavenda2/locust,heyman/locust,donglei/locust,santiavenda2/locust,ismail-s/locust,cloudant/locust,scalp42/locust,nagyistoce/locust,jacobgardner/locust,cpennington/locust,rackerlabs/locust,Diogo-Costa/locust,lixar/locust,kentzzhang/locust,fordhurley/locust,jacobgardner/locust,dmoliveira/locust,kentzzhang/locust,fengshao0907/locust,Diogo-Costa/locust,jaume-pinyol/locust,rohitgup14/locust,doctoryes/locust,wndhydrnt/locust,wndhydrnt/locust,donglei/locust,jaume-pinyol/locust,fordhurley/locust,kyroskoh/locust,moongtaeng/locust,wndhydrnt/locust,noif/locust,cloudant/locust,TZer0/locust,agoragames/locust,moongtaeng/locust,bugsduggan/locust,cpennington/locust