| AÑO | ANUAL | I | II | III | IV |
| 2000 | 2,16% | 2,18% | 2,07% | 2,18% | 2,23% |
| 2001 | 2,27% | 2,17% | 2,26% | 2,33% | 2,32% |
| 2002 | 2,31% | 2,27% | 2,30% | 2,34% | 2,31% |
| 2003 | 2,29% | 2,28% | 2,24% | 2,32% | 2,34% |
| 2004 | 2,36% | 2,39% | 2,32% | 2,29% | 2,44% |
| 2005 | 2,48% | 2,33% | 2,52% | 2,54% | 2,55% |
| 2006 | 2,76% | 2,71% | 2,74% | 2,70% | 2,91% |
| 2007 | 3,05% | 2,76% | 2,98% | 3,06% | 3,09% |
| 2008 | 3,05% | 3,08% | 3,11% | 3,25% | 3,28% |
| 2009 | 3,22% | 3,26% | 3,24% | 3,15% | 3,23% |
| 2010 | 3,17% | 3,17% | 3,15% | 3,19% | 3,18% |
| 2011 | 3,16% | 3,18% | 3,16% | N.R | N.R |