Developments in practice of sports: relation with costs. Actual and wished practice of sports: quantity and quality / perception of own sporting behaviour / changes in practice of sports during last 5 years / amount of leisure, sport versus other leisure activities, motives for sport now and in past / favourite sports / opportunities for sport: leisure, accommodations, organizations, information / preferred type of sport organization to participate in / competitive versus recreational sports / actual spendings on sports: membership dues, rent of accommodations, sportswear, equipment, refreshments etc. / changes in spendings / perception of spendings / costs and choice of sport / in case of retrenchments: economy in practice of sport, switch to cheaper sport, economy in other spendings / actual retrenchments last 5 years: negative consequences for practice of sports / expected retrenchments for future / role of government: what branches of sport and which individuals should be subsidized / evaluation of sports promotion, stimulation by organizations and individuals / non-sporters: reasons for not sporting / willingness to practice sport in future, financial obstacles. Background variables: basic characteristics/ residence/ household characteristics/ occupation/employment/ income/capital assets/ education/ organizational membership