PARALYSIS AT VARIOUS AGES, 1891.
Under 20 years, 1 person in every 2,804 was paralyzed
20 to 40 years, 1 person in every 2,902 was paralyzed
40 to 60 years, 1 person in every 568 was paralyzed
60 and upwards, years, 1 person in every 149 was paralyzed