. there are approximately 60 ships with an estimated 173000 berths that are expected to be placed in service in the global cruise market between 2017 and 2021 , although it is also possible that additional ships could be ordered or taken out of service during these periods . we estimate that the global cruise industry carried 24.0 million cruise guests in 2016 compared to 23.0 million cruise guests carried in 2015 and 22.0 million cruise guests carried in .