| 
      
        | Age    categories | Years |  
        | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 |  
        | 1-5 years old | 9 (3.08%) | 11 (4.91%) | 9 (3.69%) | 6 (2.50%) | 7 (3.04%) | 9 (3.96%) | 7 (3.23%) |  
        | 6-20 years old | 87 (29.79%) | 68(30.36%) | 73 (29.92%) | 97 (40.42%) | 89 (38.70%) | 88(38.77%) | 76 (35.02%) |  
        | 21-40 years old | 98 (33.56%) | 91(40.63%) | 95 (38.93%) | 101 (42.08%) | 73 (31.74%) | 80 (35.24%) | 80 (36.87%) |  
        | 41-60 years old | 74 (25.35%) | 45 (20.08%) | 60(24.59%) | 25 (10.42%) | 42 (18.26%) | 34(14.98%) | 33 (15.21%) |  
        | >60 years old | 24 (8.22%) | 9 (4.02%) | 7 (2.87%) | 11 (4.58%) | 19 (8.26%) | 16(7.05%) | 21 (9.67%) |  |