SOURCE: CDC/NCHS, National Vital Statistics System, Compressed Mortality File
This graph shows the trends in sudden unexpected infant death (SUID) rates in the United States from 1990 through 2016.
In 1990, the SUID rate, which includes sudden infant death syndrome, unknown cause, and accidental suffocation and strangulation in bed, was 154.6 deaths per 100,000 live births. The SUID rate declined considerably following the release of the American Academy of Pediatrics safe sleep recommendations in 1992, the initiation of the Back to Sleep campaign in 1994, and the release of the Sudden Unexplained Infant Death Investigation Reporting Form in 1996. Since 1999, declines have slowed. In 2016, the SUID rate was 91.4 deaths per 100,000 live births.
Sudden infant death syndrome (SIDS) rates declined considerably from 130.3 deaths per 100,000 live births in 1990 to 38.0 deaths per 100,000 live births in 2016
So here you have it, using CURRENT criteria to review different cohorts.