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| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2010 | 396 | 326 | 189 | — | — | — | — | — | — | — | — | — |
| 2009 | 193 | 368 | 404 | 421 | 393 | 371 | 461 | 380 | 346 | 344 | 289 | 208 |
| 2008 | 351 | 344 | 345 | 555 | 278 | 351 | 344 | 259 | 222 | 332 | 294 | 264 |
| 2007 | 739 | 515 | 673 | 394 | 435 | 303 | 433 | 665 | 326 | 389 | 518 | 277 |
| 2006 | — | — | — | — | 2 | 230 | 321 | 392 | 578 | 536 | 523 | 387 |