The figure represents a year-on-year increase of 1.6%, the office said, adding that the average price index in the first five months of this year rose by 0.86% on an annual basis.
Among the 11 groups of products and services, transportation services posted the highest growth of 2.66%, mainly driven by the price hike in petrol and oil.
Rises were seen in housing, electricity, water, fuel and building materials (1.86%), post and telecommunications (0.4%), food and catering services (0.35%), goods and other services (0.24%), culture and entertainment (0.18%), and equipment and house appliances (0.08%), among others.
On the other hand, prices of some groups of products in May reduced against the previous month, including beverages and cigarettes (0.05%) while pharmaceutical products and health services remained stable.
Besides this, domestic gold prices surged 0.84% and the US dollar price fell 0.02% compared April.
