For that indicator, we provide data for Tonga from 1976 to 2018. The average value for Tonga during that period was 99.49 percent with a minimum of 99.31 percent in 1996 and a maximum of 99.82 percent in 1976.
The latest value from 2018 is 99.44 percent. For comparison, the world average in 2018 based on 77
countries is 92.18 percent.
See the global rankings for that indicator or
use the country comparator to compare trends over time.