| Years | Total screened | 15 - 49 years | 50 - 59 years | 60+ | ||
| 2008 | 15,060 | 13,958 (92.7%) | 684 (4.5%) | 418 (2.8%) | ||
| 2009 | 11,990 | 11,188 (93.3%) | 93 (4.1%) | 309 (2.6% ) | ||
| 2010 | 11,023 | 10,054 (91.2%) | 616 (5.6%) | 353 (3.2%) | ||
| 2011 | 10,273 | 9587 (93.3%) | 428 (4.2%) | 258 (2.5% ) | ||
| 2012 | 8744 | 7919 (90.6%) | 528 (6.0%) | 297 (3.4 %) | ||
| Total | 57,090 (100%) | 52,706 (92.3%) | 2749 (4.8%) | 1635 (2.9%) | ||