- 1950 - 2007: Resident data from tabulations in department-of-public-health.
(1953 - 1954 Maternal deaths from Vital Statistics of the United States)
** 1940 - 1949: Resident data from Vital Statistics of the United States for each year.
*** 1918 - 1939: Occurrence data from United States Bureau of the Census publications.
NA (not available)