Sentences with phrase «historical background rate»
«We continue to lose biodiversity at a rate never before seen in history - extinction rates may be up to 1,000 times higher than the historical background rate.»
http://www.bbc.co.uk/ Not exact matches
These and other factors demonstrated over the span of the historical record all combine to put women in a position to qualify for lower auto insurance rates than men of similar backgrounds, ages and driving records.