| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | ||
| 2004 | 781 | 723 | 859 | 882 | 1,043 | 1,166 | 1,192 | 1,085 | 982 | 1,124 | 820 | 649 | 11,306 | |
| 2005 | 914 | 790 | 1,044 | 964 | 889 | 1,015 | 1,082 | 1,099 | 1,031 | 1,008 | 902 | 736 | 11,474 | |
| 2006 | 1,240 | 1,115 | 1,373 | 1,299 | 1,465 | 1,508 | 1,465 | 1,480 | 1,285 | 1,281 | 1,101 | 977 | 15,589 | |
| 2007 | 1,504 | 1,447 | 1,594 | 1,358 | 1,482 | 1,266 | 1,255 | 1,311 | 1,164 | 1,145 | 996 | 721 | 15,243 | |
| 2008 | 1,059 | 968 | 1,042 | 1,113 | 4,182 | |||||||||
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