The cruise industry had fewer ships in 2014 that received “not satisfactory” grades after inspection by the U.S Centers for Disease Control, but also fewer that scored a perfect 100.

Twelve vessels failed to grade out at 85, the minimum score needed to achieve a satisfactory rating, during inspections conducted in 2014.

Most were smaller, older ships carrying less than 1,000 passengers. Only one of the ships, the 2,348-passenger Norwegian Star, carried more than 2,000 passengers. The Star received an unsatisfactory grade on Feb. 16, then received a 95 on its next inspection on April 25.

The Bahamas Celebration, operated from West Palm Beach by Celebration Cruise Line, was the only ship to receive an unsatisfactory grade twice in 2014. It also did once in 2013. It was recently replaced by Grand Celebration, operated by a reorganized company, Bahamas Paradise Cruise Line.

Un-Cruise Adventures, an operator of smaller ships along the U.S. West coast, had two ships receive unsatisfactory grades in 2014, the Safari Endeavor and Safari Quest. The 86-passenger Safari Endeavor also did once in 2013.

The newly launched Pearl Mist operated by Pearl Seas Cruises was graded 61 in an inspection on July 15.  Pearl Seas is a new cruise line that hadn’t operated ocean cruise ships before.

The low score of 31 was given to Schooner Zodiac, a 26-passenger two-masted tall ship sailing out of Belllingham, Wash.

Following their unsatisfactory grades, the Bahamas Celebration received a 90 on Sept. 3, the Safari Endeavor a 93 on Sept. 7, and the Safari Quest an 87 on July 18. The Pearl Mist submitted a nine-page corrective-action report but has not been reinspected. The Schooner Zodiac has not submitted a corrective-action report and has not been reinspected.

This year, 26 ships received perfect scores, down from 39 in 2013. Carnival Cruise Lines had eight ships that got perfect 100s, and Royal Caribbean International had six. Other lines with ships getting perfect scores were Holland America Line, Princess Cruises, Celebrity Cruises, Norwegian Cruise Line and Disney Cruise Line.

Last year, 17 ships received unsatisfactory scores below 85, according to CDC records.