Inflation - country data from around the world:
The average for 2015 was 3.97 percent.
The highest value was in Venezuela: 121.7 percent and the lowest value was in Lebanon: -3.7 percent.
Below is a chart for all countries where data are available for: Inflation.
World bank definition: Inflation as measured by the consumer price index reflects the annual percentage change in the cost to the average consumer of acquiring a basket of goods and services that may be fixed or changed at specified intervals, such as yearly. The Laspeyres formula is generally used.