The cruise industry’s total spending in the US rose by 4.6% to $21.02 billion last year, according to figures released by Cruise Lines’ International Association (CLIA).

The growth rate almost doubled from a figure of 2.4% in 2013 over the previous year.

The number of US cruise passengers rose by 5.8% to 11.3 million in 2014, a much stronger performance than the 0.3% rise in 2013 on the previous year, the figures show.