Quarterly GDP data uses the expenditure approach for national level and province level which are collected from Statistics Indonesia (BPS) website. Both of the data uses constant price and uses 2010 as the base year. Quarterly GDP growth (%YoY) are calculated by subtracting the latest year with the quarterly GDP in the previous year divided by GDP in the previous year then multiplied by 100% with the condition that the quarterly GDP in the latest year must be the same quarter as the quarterly GDP in the previous year.