The trend of V.cholerae by year and months of reporting
during the study period is presented in Fig. 1. The number of
cases reported gradually declined after 2005, and then
increased in 2010. That is, the mean (sd) of cases reported
from 2000 to 2004 and 2005 to 2010 was 11.2(8.0) and 5.1(7.4)
respectively.