All reported influenza epidemics and months with excess mortality in Singapore, 1972 onwards.

*Month with highest excess mortality during a reported influenza epidemic period, or month with highest excess mortality in a period with significant excess mortality.
†Sum of positive deviations from the expected mortality for three-month period centered around the month with peak excess mortality; excess mortality rate is derived using estimates for total Singapore population during that period.
‡Periods with significant excess mortality.