| Years | All banks | Large banks |
| 2015-16 | 0.9923765 | 0.9950249 |
| 2014-15 | 0.9902212 | 1.00 |
| 2013-14 | 0.9899543 | 1.00 |
| 2013-12 | 0.9895288 | 0.9850746 |
| 2012-11 | 0.9882162 | 1.00 |
| 2011-10 | 0.9905730 | 1.00 |
| 2009-10 | 0.9887127 | 0.9950249 |
| 2008-09 | 0.9878415 | 0.9850746 |
| 2007-08 | 0.9869169 | 1.00 |
| 2006-07 | 0.9858757 | 0.9900498 |