Venezuela (Bolivarian Republic of) is being the top country by CPI in the world. As of 2015, CPI in Venezuela (Bolivarian Republic of) was 121.7 %. The top 5 countries also includes South Sudan, Ukraine, Malawi, and Ghana.
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.