| Year | Jan | Feb | Mar | Apr | May | June | July | Aug | Sep | Oct | Nov | Dec | Total | Man Hours |
| 2011 | 65 | 29 | 51 | 41 | 58 | 53 | 65 | 60 | 55 | 41 | 49 | 38 | 605 | 3384 |
| 2010 | 35 | 35 | 33 | 41 | 52 | 50 | 53 | 64 | 41 | 39 | 55 | 47 | 545 | 2700 |
| 2009 | 55 | 36 | 43 | 53 | 39 | 49 | 60 | 42 | 38 | 34 | 42 | 48 | 539 | |
| 2008 | 28 | 26 | 26 | 27 | 29 | 32 | 45 | 42 | 31 | 38 | 30 | 28 | 382 | |
| 2007 | 36 | 38 | 42 | 61 | 40 | 40 | 44 | 28 | 38 | 29 | 26 | 26 | 443 | |
| 2006 | 32 | 35 | 31 | 42 | 32 | 41 | 65 | 50 | 45 | 27 | 34 | 35 | 478 | |
| 2005 | 59 | 36 | 49 | 55 | 33 | 47 | 67 | 63 | 54 | 36 | 27 | 31 | 560 | |
| 2004 | 424 |
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