| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2008 | 0 | 0 | 0 | 0 | 0 | 0 | 141 | 1143 | 739 | 1213 | 1111 | 1150 |
| 2009 | 1226 | 1548 | 1905 | 1642 | 1956 | 2199 | 2381 | 2331 | 2395 | 2743 | 2324 | 1709 |
| 2010 | 1894 | 2038 | 2713 | 2492 | 2269 | 2619 | 3027 | 3308 | 2972 | 3076 | 3032 | 2323 |
| 2011 | 2817 | 3107 | 3847 | 3735 | 3596 | 3730 | 3563 | 3856 | 3996 | 4254 | 4505 | 3740 |
| 2012 | 3958 | 4465 | 5945 | 4739 | 5372 | 5211 | 4494 | 5343 | 4834 | 5650 | 5605 | 4402 |
| 2013 | 5161 | 5196 | 5818 | 6655 | 6741 | 6444 | 6230 | 6331 | 5404 | 7176 | 6229 | 5067 |
| 2014 | 5838 | 6224 | 6916 | 7041 | 6992 | 6882 | 6767 | 6528 | 6331 | 6350 | 5082 | 5123 |
| 2015 | 5560 | 6102 | 6277 | 6431 | 5552 | 6610 | 6084 | 6638 | 6187 | 5533 | 5070 | 4865 |
| 2016 | 5314 | 5751 | 6050 | 6326 | 6174 | 6331 | 5491 | 6960 | 6400 | 6625 | 6587 | 5453 |
| 2017 | 6398 | 6391 | 7392 | 6953 | 7913 | 7591 | 6911 | 8214 | 6372 | 7474 | 7669 | 5761 |
| 2018 | 6748 | 5972 | 6907 | 3058 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |