10%
Operational Standard
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| 2009 | 7.077435% | 5.236908% | 4.675964% | |||||||||
| 2010 | 6.642402% | 7.057654% | 5.134281% | 5.204163% | 6.011854% | 5.653451% | 6.099291% | 7.020164% | 6.250000% | 6.779661% | 6.833559% | 5.186880% |
| 2011 | 8.414239% | 8.899522% | 4.793171% | 5.461538% | 7.256894% | 8.807588% | 8.146067% | 5.544554% | 6.950820% | 6.392045% | 5.351386% | 4.980080% |
| 2012 | 5.285714% | 5.629398% | 2.214765% | 5.112045% | 5.976587% | 5.006954% | 4.758842% | 5.469846% | 5.411103% | 4.753199% | 4.231487% | 3.268428% |
| 2013 | 5.885998% | 5.394191% | 3.698332% | 4.931862% | 5.329949% | 3.912148% | 5.017710% | 5.000000% | 5.490196% | 5.872388% | 6.298277% | 4.539642% |
| 2014 | 6.092308% | 6.780982% | 4.413702% | 4.875218% | 6.204380% | 7.448107% | 5.938914% | 5.760214% | 6.294537% | 7.071269% | 6.485235% | 5.944444% |
| 2015 | 9.307876% | 10.186514% | 7.117438% | 7.065868% | 7.422402% | 6.453523% | 5.594785% | 6.027220% | 6.799784% | 6.654783% | 6.962025% | 6.104808% |
| 2016 | 7.362356% | 9.973404% | 7.191781% | 9.057751% | 9.182464% | 7.940161% | 7.658506% | 7.182018% | 8.106509% | 8.672249% | 7.522837% | 6.534091% |
| 2017 | 9.429701% | 9.936125% | 7.150838% | 6.894288% | 8.018868% | 8.059211% | 9.520958% | 8.070757% | 7.904884% | 10.732253% | 8.960573% |