<Tr> <Td> 1969 </Td> <Td> Iron Butterfly! Iron Butterfly </Td> <Td> United States </Td> <Td> Iron Butterfly! In - A-Gadda - Da - Vida </Td> <Td> </Td> </Tr> <Table> <Tr> <Th> Year </Th> <Th> Performing artist (s) </Th> <Th> Nationality </Th> <Th> Album </Th> <Th> Ref . </Th> </Tr> <Tr> <Td> 1970 </Td> <Td> Simon and Garfunkel! Simon and Garfunkel </Td> <Td> United States </Td> <Td> Simon and Garfunkel! Bridge over Troubled Water </Td> <Td> </Td> </Tr> <Tr> <Td> 1971 </Td> <Td> Various! Various Artists </Td> <Td>--</Td> <Td> Various! Jesus Christ Superstar </Td> <Td> </Td> </Tr> <Tr> <Td> 1972 </Td> <Td> Neil Young! Neil Young </Td> <Td> Canada </Td> <Td> Neil Young! Harvest </Td> <Td> </Td> </Tr> <Tr> <Td> 1973 </Td> <Td> War! War </Td> <Td> United States </Td> <Td> War! The World Is a Ghetto </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Elton John! Elton John </Td> <Td> United Kingdom </Td> <Td> Elton John! Goodbye Yellow Brick Road </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> Elton John! Elton John </Td> <Td> United Kingdom </Td> <Td> Elton John! Elton John's Greatest Hits </Td> <Td> </Td> </Tr> <Tr> <Td> 1976 </Td> <Td> Peter Frampton! Peter Frampton </Td> <Td> UK / USA </Td> <Td> Peter Frampton! Frampton Comes Alive </Td> <Td> </Td> </Tr> <Tr> <Td> 1977 </Td> <Td> Fleetwood Mac! Fleetwood Mac </Td> <Td> UK / USA </Td> <Td> Fleetwood Mac! Rumours </Td> <Td> </Td> </Tr> <Tr> <Td> 1978 </Td> <Td> Bee Gees / Soundtrack! Bee Gees / soundtrack </Td> <Td>--</Td> <Td> Saturday Night Fever (soundtrack)! Saturday Night Fever </Td> <Td> </Td> </Tr> <Tr> <Td> 1979 </Td> <Td> Billy Joel! Billy Joel </Td> <Td> United States </Td> <Td> Billy Joel! 52nd Street </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Year </Th> <Th> Performing artist (s) </Th> <Th> Nationality </Th> <Th> Album </Th> <Th> Ref . </Th> </Tr> <Tr> <Td> 1970 </Td> <Td> Simon and Garfunkel! Simon and Garfunkel </Td> <Td> United States </Td> <Td> Simon and Garfunkel! Bridge over Troubled Water </Td> <Td> </Td> </Tr>

Who sold the most albums in the 70s