Regarding the United States, mortality records were obtained from the Centers for Disease Control and Prevention CDC of the National Center for Health Statistics NCHS, and the population data were obtained from the United States Census Bureau USCB.
Respecto a Estados Unidos, los registros de mortalidad se obtuvieron del Centers for Disease Control and Prevention CDC del National Center for Health StatisticsNCHS, y la población delUnited States Census Bureau USCB.