Age Decreased at first campaign (1999-2003) (%) Decreased at second campaign (2004-2007) (%)
0- 29.12 46.16
1- 44.84 69.48
5- 46.50 78.72
10- 38.36 83.93
15- 45.03 66.51
Total 43.29 72.87
Table 10: The percentage of decreased incidence from difference period of campaign (%) comparing with the previous period incidence.
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