This table describes the cumulative incidence of Gastrointestinal Illness (GI) for a single cruise port where cruise ships embark (origin port) over an eight-year calendar period. The annual average percentage rate of GI is calculated by utilizing cruise ship 'self-reported' voyage data from the Centers for Disease Control. Ships are required to provide this information when one or more segments of the voyage 'touches / docks' at a U.S. controlled port.

NOTES: (1) Total Ship Voyages are the total number of voyages reported to the CDC for this port during the eight-year period. (2) Total Sick Voyages are those voyages with at least one person reporting sick to the ship medical officer wih a diagnosis that meets the CDC definition of GI Illness. (3) Total persons are counted for each voyage and the sum of sum of crewmembers and passengers are reported. The total number of crew during the eight-year period is the sum of crew present on each distinct voyage. (4) Total sick persons reported to the CDC over the eight-year period. The three separate categories are crew, passengers, and the combined total of crew and passengers. (5) Mean Percent is the arithmetic mean for each category of crew, passengers and combined crew and passengers. (6) Median Percent is the median (middle) percent in each category. (7) Percentile Rank is based on the arithmetic mean. (8) Sample Size is the total number of ships that visit the port.