The ESPAD – European School Survey on Alcohol and Other Drugs – programme was launched in 1994 with the aim of collecting data on young people's smoking, alcohol and other drug consumption patterns. Aim is to collect data which are comparable across countries and over time. The survey is repeated every four years. The most important long-term goal of the project is to measure the changes in the consumption habits of young people and to compare the different trends of the participating countries. The first survey was
conducted in 1995 with the participation of 26 European countries. Subsequently, data were collected in 1999, 2003, 2007, 2011, and 2015. In 2019, the seventh data collection wave of ESPAD took place. The number of participating countries varied between 30 and 35 along the different surveys.