(i) 12-month inflation: normally considered as inflation rate, is defined as the percentage change in the monthly consumer price index (CPI). For example, the 12-month inflation rate for November 2017 is the percentage change in the CPI of November 2017 and November 2016.
(ii) Annual average inflation: is the percentage change in the annual average consumer price index (CPI) of the corresponding months e.g. November 2017 and November 2016.
(iii) Source: Kenya National Bureau of Statistics.
The latest Kenyan Inflation rates can be downloaded here