Complex sentence: In 2015, Disney Cruise Lines had 2.8% share of the worldwide cruise market by passenger and 2.4% by revenue, while in 2011, the company held a 1.95 market share.
Split into simpler sentences: In 2015, Disney Cruise Lines had 2.8% share of the worldwide cruise market by passenger and 2.4% by revenue. While in 2011, the company held a 1.95 market share.