throw error if indicators yeild no data
throw error if indicators yeild no data

SeedScientific/polio,unicef/polio,SeedScientific/polio,unicef/rhizome,unicef/rhizome,unicef/rhizome,unicef/rhizome,unicef/polio,SeedScientific/polio,unicef/polio,SeedScientific/polio,SeedScientific/polio,unicef/polio