 Millennials go on more cruises. And Cruise Lines International Association also says 43% of cruisers now say they want to book longer sailings. Denise Pellegrini, Bloomberg Radio. We are the NFHS. That stands for the National Federation of State High School Associations. But really, what we stand for, together with the IGHSAU, are the 56,000 female high school sports students in Iowa.