That is the range of ages for which they found an increase but the biggest increase is in the 30-34 age subgroup. The report is not hard to skim, the overall pi

That is the range of ages for which they found an increase but the biggest increase is in the 30-34 age subgroup. The report is not hard to skim, the overall picture is rural populations particularly in southern states are dying much more of "natural" causes like heart disease and cancer, and that divergence from urban populations started in the mid 80s. There's some speculation in the report as to why.