don't display densities as range if lower=upper
don't display densities as range if lower=upper

BenDoan/playground,BenDoan/playground,BenDoan/playground,BenDoan/playground,BenDoan/playground,BenDoan/playground,BenDoan/playground,BenDoan/playground,BenDoan/playground,BenDoan/playground,BenDoan/playground,BenDoan/playground