What made the Atlantic Hurricane Season of 2009 so quiet (lowest number of storms since 1997)?

The Atlantic hurricane season is from June to November, and hurricanes are usually form in the Atlantic ocean. Hurricanes are also known as tropical cyclones. A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center. Cyclones are named by meteorological services from a list of names that are suggested by various countries that are a part of the specific meteorological service. There are warning centers in each tropical cyclone basin that monitor the formation of hurricane cells and give ample warning before their landfall.