1. The Consumer Price Index (CPI) is intended to capture price changes for a fixed basket of consumption goods and services commonly purchased by resident households in Singapore. The components and weights of the CPI basket of goods and services are derived from the actual consumption patterns of resident households gathered from the Household Expenditure Survey (HES). The HES is a comprehensive survey of the consumption expenditure of resident households in Singapore, covering around 7,500 resident households.  It is conducted once every 5 years.  The CPI basket was last revised in 2010, based on the resident household consumption patterns thrown up by the 2007/2008 HES.  It will be updated again following the next HES to be conducted starting in October this year.