OECD country inflation data. You will have to look for the pull down menu that says "Measure." Then pick the one that says "Percentage change from the previous period." That will get the annual inflation rates for different countries.
CIA World Factbook. Belarus had the highest with 52%. Ethiopia had 33.2% and Venezuela had 26.1. Four more countries had 20% or higher. Then another 24 countries had 10% or higher.
Supposedly Keynes said that in the German hyper-inflation of the 1920s, people would order 2 or more pitchers of beer at a time because the price would rise if they waited. But that meant the cost was drinking warm, stale beer later. Prices rose a trillion times in one year.