Consider the CPI series of the hypothetical economy, Meanchester United, from 2015 - 2021 (base period 2015) provided below. Determine the rate of inflation (hint, you will need to determine the percentage change in CPI) from the year 2015 to the year 2021. Give your answer to ONE Decimal place (do not include % in your answer).

Year (t)	CPI t, 2015
2015	100
2016	102.2
2017	105.0
2018	106.7
2019	108.5
2020	110.4
2021	115.9