7%
Operational Standard
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| 2009 | ||||||||||||
| 2010 | 11.828176% | 7.242498% | 5.768135% | 6.367556% | 5.082922% | 5.811727% | 5.798433% | 5.928046% | 5.723454% | 4.144133% | 4.417803% | 5.640601% |
| 2011 | 4.728967% | 3.883861% | 4.835165% | 5.176299% | 5.826201% | 5.249038% | 4.047850% | 4.246106% | 3.814111% | 3.341576% | 3.831528% | 3.860666% |
| 2012 | 4.200303% | 3.792104% | 3.783387% | 5.600162% | 3.722401% | 5.391519% | 4.167668% | 4.549142% | 4.133557% | 3.782389% | 5.276555% | 4.681927% |
| 2013 | 4.903226% | 4.039799% | 4.094942% | 4.876366% | 4.187318% | 4.888352% | 5.278455% | 6.290941% | 5.150485% | 3.833443% | 5.125511% | 4.439102% |
| 2014 | 5.779484% | 5.512745% | 6.791394% | 10.544449% | 9.987182% | 8.281009% | 7.375651% | 6.720870% | 5.137635% | 4.158142% | 5.517019% | 5.574841% |
| 2015 | 5.771079% | 4.684922% | 5.514284% | 7.259108% | 5.541076% | 7.002899% | 7.562038% | 8.282623% | 7.251374% | 5.556991% | 6.548899% | 7.584698% |
| 2016 | 7.626770% | 5.491500% | 6.347097% | 8.440848% | 7.943162% | 8.074502% | 7.860922% | 7.809124% | 4.328709% | 3.897201% | 3.944751% | 4.828221% |
| 2017 | 6.238946% | 6.210755% | 8.352392% | 10.258497% | 9.519954% | 8.415639% | 6.510830% | 6.888184% | 6.793909% | 4.596849% | 4.354895% |