According to Stephen Few, bar charts are often the best option to display ranking. The most frequent service category of claims by far are curative care visits, almost double the number of claims compared to the next most frequent category. And this is true across both Eastern and Northern zones.
The Northern and Eastern zone begin to differ with the 5th ranked service category, and the least frequent is different depending on zone as well. In the Eastern zone, both inpatient obstetrics and inpatient medical claims were the least frequent, with each service category only having 2 claims. In the Northern zone, speech therapy was the least frequent with only 1 claim.