life sdyNotably, D.C. had the lowest life expectancy for the 1900 birth cohort but achieved an improvement of 30 years for females and 38 years for males by 2000 — a testament toNotably, D.C. had the lowest life expectancy for the 1900 birth cohort but achieved an improvement of 30 years for females and 38 years for males by 2000 — a testament to