| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2008 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 129 | 503 | 505 | 521 |
| 2009 | 777 | 1128 | 1414 | 1186 | 1594 | 1666 | 1903 | 1908 | 2009 | 2413 | 2010 | 1457 |
| 2010 | 1716 | 1834 | 2459 | 2234 | 2026 | 2264 | 2680 | 2919 | 2612 | 2754 | 2738 | 2038 |
| 2011 | 2446 | 2676 | 3404 | 3174 | 3145 | 3118 | 2907 | 3102 | 3315 | 3634 | 3816 | 3204 |
| 2012 | 3260 | 3756 | 5157 | 4019 | 4480 | 4414 | 3792 | 4527 | 4180 | 4869 | 4896 | 3740 |
| 2013 | 4392 | 4554 | 5104 | 5972 | 6090 | 5814 | 5542 | 5631 | 4752 | 6220 | 5403 | 4378 |
| 2014 | 4921 | 5341 | 5826 | 5959 | 5970 | 5710 | 5569 | 5527 | 5511 | 5527 | 4508 | 4510 |
| 2015 | 4845 | 5495 | 5564 | 5691 | 4881 | 5780 | 5497 | 5951 | 5654 | 4993 | 4450 | 4301 |
| 2016 | 4719 | 5255 | 5553 | 5749 | 5627 | 5788 | 4930 | 6338 | 5873 | 6119 | 6034 | 4992 |
| 2017 | 5928 | 5909 | 6828 | 6490 | 7310 | 6923 | 5923 | 6943 | 5428 | 6565 | 6757 | 5034 |
| 2018 | 5835 | 5235 | 5912 | 2685 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |