Valuable insights emerged from research . Singapore found that volunteer participation increased by 60 per cent between 2000 and 2002 ; studies in Norway indicated that volunteering accounts for more than 6 per cent of gross national product ; a South Africa study revealed that volunteers constitute 43 per cent of the non-profit sector workforce ; Finland determined that a third of the population would volunteer if given proper incentives ; Albanian research underlined the need to engage less advantaged citizens as volunteers ; and a United Nations Development Programme ( UNDP ) -funded survey in Bulgaria revealed a limited organizational capacity to tap widespread willingness to volunteer .