From thonline.com (otherwise known as Telegraph Herald):

Titanic: The Artifact Exhibition” drew 154,065 people to the National Mississippi River Museum & Aquarium during its 20-week run, which ended  Oct. 11. At 5,000 square-feet, “Titanic: The Artifact Exhibition” was  the largest exhibit ever hosted at the river museum.

Source:’Titanic’ exhibit drew 154,065 to river museum (13 Oct
2015, thonline.com)