tiered by rating & sorted chronologically within each tier, so 5 stars 1970→1979, then 4 stars 1970→1979, etc.

tiered by rating then sorted chronologically within each tier, so 5 stars 2010→2019, then 4 stars 2010→2019, etc.

tiered by rating then sorted chronologically within each tier, so 5 stars 2000→2009, then 4 stars 2000→2009, etc.

tiered by rating then sorted chronologically within each tier, so 5 stars 1990→1999, then 4 stars 1990→1999, etc.

tiered by rating then sorted chronologically within each tier, so 5 stars 1960→1969, then 4 stars 1960→1969, etc.