DDB Needham Life Style Surveys were a series of yearly surveys organized by DDB Needham advertising agency, measuring a number of social trends in United States. They began in 1975 and continued as late as 1999. Yearly samples were about 3,000 3,500-4,000 or 5,000 respondents (difference in reported numbers seems to be related to some sources citing numbers of surveys send versus number of respondents). Surveys were sent out in April, with a follow-up in May targeting groups with below-average response rates (low income groups and minorities, such as African Americans and Hispanics).