| | | Month | Total Time in Hours | | 2008 Oct | 19,085 |    |
| 2008 Sep | 17,519 | |
| 2008 Aug | 16,776 | |
| 2008 Jul | 17,375 | |
| 2008 Jun | 17,944 | |
| 2008 May | 17,382 | |
| 2008 Apr | 19,232 | |
| 2008 Mar | 16,710 | |
| 2008 Feb | 14,471 | |
| 2008 Jan | 15,932 | |
| 2007 Dec | 14,485 | |
| 2007 Nov | 15,638 | |
| 2007 Oct | 17,126 | |
| 2007 Sep | 16,113 | |
| 2007 Aug | 15,139 | |
| 2007 Jul | 15,149 | |
| 2007 Jun | 15,774 | |
| 2007 May | 15,683 | |
| 2007 Apr | 15,216 | |
| 2007 Mar | 14,681 | |
| 2007 Feb | 13,416 | |
| 2007 Jan | 16,394 | |
| 2006 Dec | 14,523 | |
| 2006 Nov | 16,333 | |
| 2006 Oct | 16,138 | |
| 2006 Sep | 15,049 | |
| 2006 Aug | 14,736 | |
| 2006 Jul | 13,856 | |
| 2006 Jun | 13,530 | |
| 2006 May | 14,632 | |
| 2006 Apr | 13,196 | |
| 2006 Mar | 13,474 | |
| 2006 Feb | 11,200 | |
| 2006 Jan | 11,534 | |
| 2005 Dec | 11,124 | |
| 2005 Nov | 12,135 | |
| 2005 Oct | 10,153 | |
| 2005 Sep | 10,201 | |
| 2005 Aug | 9,700 | |
| 2005 Jul | 8,421 | |
| 2005 Jun | 8,826 | |
| 2005 May | 8,349 | |
| 2005 Apr | 7,029 | |
| 2005 Mar | 7,265 | |
| 2005 Feb | 6,791 | |
| 2005 Jan | 7,216 | |
| 2004 Dec | 7,261 | |
| 2004 Nov | 6,588 | |
| 2004 Oct | 6,661 | |
|
