<p><strong><em>Results</em></strong><strong>: </strong>Among 356,775 screened outpatient attendants, 9728 were diagnosed with diabetes mellitus, resulting in a period prevalence of 2.7%. It accounts for 0.13% of the 7638328 health facility visitors over the study period. Of these patients, 7,447 (78%) had type II diabetes mellitus. More than half, 5447 (56%) of all DM cases were males, and the majority of the diabetes patients, 7,036 (72.6%), were over the age of 30 years. Overall, the diabetes mellitus trend increased from 0.2% to 0.7% during the four years.</p>