The table on the right shows the ACE for each storm in the season. ACE means the measure of the power of the hurricane multiplied by the length of time it existed, so storms that last a long time, as well as particularly strong hurricanes, have higher ACEs. ACE is only calculated for full advisories on tropical systems at or exceeding 35 knots (39 mph, 63 km/h) or tropical storm strength. The 1983 season had a cumulative ACE of 16.86 (17), which is extremely below normal and currently the least active season on record since 1914, which had an ACE rating of 2.53.