| Date | 2011 | 2012 | 2013 | Average | Date | 2011 | 2012 | 2013 | Average | Date | 2011 | 2012 | 2013 | Average |
| 6_1 | 31.9 | 30.5 | 30.7 | 31.3 | 7_1 | 32.6 | 37.2 | 28.4 | 32.7 | 8_1 | 37 | 37.9 | 31.4 | 35.4 |
| 6_2 | 33.1 | 26.1 | 26.7 | 30 | 7_2 | 33.6 | 36.8 | 28.5 | 32.9 | 8_2 | 37.5 | 36 | 31.4 | 35.2 |
| 6_3 | 33.9 | 32 | 24.9 | 30.3 | 7_3 | 34 | 33.1 | 29.1 | 32.1 | 8_3 | 39.5 | 35.2 | 33 | 35.9 |
| 6_4 | 35.7 | 35.4 | 25.8 | 32.3 | 7_4 | 35.4 | 37.6 | 28.9 | 34 | 8_4 | 42.1 | 36.4 | 31.8 | 36.8 |
| 6_5 | 35.9 | 29.6 | 26.9 | 30.8 | 7_5 | 35.8 | 38.1 | 29.7 | 34.5 | 8_5 | 38 | 37.7 | 32.6 | 36.1 |
| 6_6 | 35.2 | 31.4 | 28.2 | 31.6 | 7_6 | 33.6 | 37.1 | 31.8 | 34.2 | 8_6 | 38.9 | 35.6 | 34.8 | 36.4 |
| 6_7 | 35.6 | 30.6 | 26.4 | 30.8 | 7_7 | 35.8 | 38.4 | 30.9 | 35 | 8_7 | 40.3 | 34.8 | 35.9 | 37 |
| 6_8 | 35.3 | 29.3 | 27.6 | 30.7 | 7_8 | 32.2 | 37.7 | 32.8 | 34.2 | 8_8 | 39.9 | 35.6 | 34.9 | 36.8 |
| 6_9 | 33.9 | 31.3 | 28.7 | 31.3 | 7_9 | 34.7 | 29.1 | 33.6 | 32.5 | 8_9 | 37.9 | 36.2 | 36.7 | 36.9 |
| 6_10 | 33.9 | 32.3 | 29.3 | 31.8 | 7_10 | 35.3 | 30.7 | 34.3 | 32.7 | 8_10 | 32.8 | 36.4 | 35.1 | 34.8 |
| 6_11 | 34.3 | 32.5 | 33.6 | 33.5 | 7_11 | 38.6 | 30.5 | 36.3 | 35.1 | 8_11 | 32.3 | 33.4 | 31.3 | 32.3 |
| 6_12 | 34.7 | 34.8 | 35 | 34.8 | 7_12 | 37.8 | 29.4 | 34.5 | 33.9 | 8_12 | 27.4 | 29.9 | 35.6 | 31 |
| 6_13 | 31.1 | 31.9 | 33.9 | 32.3 | 7_13 | 37.6 | 28.7 | 30.9 | 32.4 | 8_13 | 33.8 | 33.6 | 34.5 | 34 |
| 6_14 | 36.3 | 30.5 | 34.5 | 33.8 | 7_14 | 35.2 | 29.1 | 29.7 | 31.3 | 8_14 | 29 | 36.2 | 28.9 | 31.4 |
| 6_15 | 35.5 | 33.3 | 30.8 | 33.2 | 7_15 | 31.3 | 29.4 | 30.8 | 30.5 | 8_15 | 30.7 | 28.2 | 26.2 | 28.4 |
| 6_16 | 34.9 | 33.6 | 30.6 | 33 | 7_16 | 33.8 | 30.2 | 32.2 | 32.1 | 8_16 | 29.5 | 30.3 | 25.4 | 28.4 |
| 6_17 | 29.6 | 34.2 | 31.3 | 31.7 | 7_17 | 33.7 | 31.8 | 31.5 | 32.3 | 8_17 | 31.3 | 35.4 | 24.2 | 30.3 |
| 6_18 | 35.1 | 33.5 | 28.2 | 32.3 | 7_18 | 31.7 | 33.7 | 34 | 33.1 | 8_18 | 35.5 | 31.3 | 27.2 | 31.3 |
| 6_19 | 35.2 | 33.1 | 29.4 | 32.6 | 7_19 | 32.9 | 35.2 | 33.6 | 33.9 | 8_19 | 28.2 | 27.1 | 27.2 | 27.5 |
| 6_20 | 36.1 | 33 | 30.9 | 33.3 | 7_20 | 33.6 | 36.8 | 32.8 | 34.4 | 8_20 | 34.8 | 28.8 | 30.1 | 31.3 |
| 6_21 | 35 | 33 | 32.1 | 33.4 | 7_21 | 36.8 | 38.7 | 34.1 | 36.5 | 8_21 | 34.6 | 29.9 | 31.4 | 32 |
| 6_22 | 32.6 | 34.1 | 33.1 | 33.3 | 7_22 | 36.6 | 33.3 | 33.1 | 34.3 | 8_22 | 30.7 | 30.5 | 33 | 31.4 |
| 6_23 | 32.7 | 34.9 | 32.3 | 33.3 | 7_23 | 35.8 | 32.5 | 33.7 | 34 | 8_23 | 35.2 | 32.3 | 33.2 | 33.6 |
| 6_24 | 35.8 | 36 | 32.7 | 34.8 | 7_24 | 36.6 | 33.8 | 32.2 | 34.2 | 8_24 | 36.3 | 32.2 | 33.3 | 33.9 |
| 6_25 | 33.6 | 38.2 | 32.9 | 34.9 | 7_25 | 34.1 | 34.6 | 30.4 | 33.1 | 8_25 | 29.1 | 31.8 | 33.3 | 31.4 |
| 6_26 | 36.5 | 40.7 | 32.6 | 36.6 | 7_26 | 35.4 | 35.4 | 29.2 | 33.3 | 8_26 | 33.6 | 31.5 | 32.2 | 32.4 |
| 6_27 | 36.9 | 37.2 | 34.1 | 36.1 | 7_27 | 35 | 35.8 | 26 | 32.3 | 8_27 | 30.9 | 32.9 | 32.2 | 32 |
| 6_28 | 36.3 | 37.7 | 35.9 | 36.6 | 7_28 | 35.4 | 32.1 | 28.3 | 31.9 | 8_28 | 32.1 | 33.6 | 32.6 | 32.8 |
| 6_29 | 28.3 | 40.7 | 35.6 | 34.9 | 7_29 | 34.1 | 37.4 | 30.5 | 34 | 8_29 | 32.8 | 32 | 33.4 | 32.7 |
| 6_30 | 33.3 | 39.6 | 32.2 | 35 | 7_30 | 31.8 | 36 | 31.5 | 33.1 | 8_30 | 30.9 | 34.1 | 34.2 | 33.1 |
| 7_31 | 35.2 | 40.7 | 31.6 | 35.8 | 8_31 | 33.9 | 27.6 | 35 | 32.2 |