Original: The 1983 season had a cumulative ACE of 16.86 (17), which is well below normal and currently the least active season on record since the 1914 season, which had an ACE rating of 2.53.
Simplified: 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.