| Month | 1 | 2 | 3 | 4 | 5 |
| April 2012 | 0,47% | 0,56% | 0,52% | 0,6% | 0,56% | May 2012 | 0,55% | 0,7% | 0,78% | 0,79% | 0,83% | June 2012 | 0,66% | 0,86% | 0,86% | 1,02% | 1,08% | July 2012 | 0,44% | 0,64% | 0,73% | 1,04% | 1,24% | August 2012 | 0,71% | 0,86% | 0,95% | 1,09% | 1,27% | September 2012 | 0,47% | 0,5% | 0,43% | 0,48% | 0,47% | October 2012 | 0,35% | 0,41% | 0,58% | 0,79% | 0,89% | November 2012 | 0,64% | 0,77% | 0,73% | 0,94% | 0,97% | December 2012 | 0,61% | 0,63% | 0,76% | 0,79% | 0,89% | January 2013 | 0,44% | 0,47% | 0,53% | 0,63% | 0,6% | February 2013 | 0,75% | 0,83% | 0,99% | 1,18% | 1,28% | March 2013 | 0,64% | 0,87% | 1,15% | 1,36% | 1,59% |
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