|
| 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | Average |
| January | 31 | 101 | 15 | 31 | 85 | 96 | 58 |
| February | 64 | 100 | 100 | 82 | 100 | 29 | 80 |
| March | 27 | 50 | 60 | 50 | 60 | 14 | 44 |
| April | 32 | 38 | 0 | 26 | 48 | 8 | 29 |
| May | 6 | 20 | 16 | 20 | 20 | 20 | 17 |
| June | 16 | 12 | 0 | 0 | 20 | 20 | 11 |
| July | 12 | 20 | 8 | 14 | 18 | 0 | 15 |
| August | 24 | 18 | 36 | 13 | 6 | 40 | 22 |
| September | 60 | 45 | 0 | 14 | 21 | 40 | 30 |
| October | 0 | 22 | 0 | 29 | 58 | 32 | 24 |
| November | 120 | 9 | 0 | 38 | 85 | 96 | 47 |
| December | 62 | 76 | 121 | 0 | 140 | 48 | 73 |
| Average | 455 | 511 | 356 | 317 | 660 | 442 | 451 |