According to Cruise Lines International Association, cruising has grown 16% in the United States since 2010. In 2014, 11 million passengers worldwide embarked from American ports, where Florida accounted for 62% of all U.S. embarkations.
I'm not surprised the slightest....ever since 911 flying is become more difficult so it makes sense cruising would become more popular since you don't have to go through so many hurdles just to get on a boat!