Dear Silvia Jin, Thank you for visiting the KOSIS website. On March 2nd, the Index of Industrial Production and the Index of Services by Industry were released with 2015 as the base year. According to the UN Recommendation, the Index of Industrial Production changed from the fixed weight method to the chain weighted method. In the meantime, the Index of Services used the fixed weight Laspeyres formula, which is the same methodology as the previous one. Thank you.