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Mega Ships (more than 4,000 passengers) Norwegian Cruise Line 86.72Royal Caribbean International 86.69Carnival Cruise Line 85.35MSC Cruises 83.42Large Ships (2,500 to 4,000 passengers) Virgin Voyages 94.07Disney Cruise Line 92.21Cunard 89.55Princess Cruises 89.42Celebrity Cruises 88.57Costa Cruises 87.95Holland America Line 87.79Norwegian Cruise Line 86.41Royal Caribbean International 84.31MSC Cruises 83.77P&O Cruises 81.73Carnival Cruise Line 80.37Medium Ships (500 to 2,500 passengers) Viking 94.98Disney Cruise Line 92.92Seabourn 91.67Regent Seven Seas Cruises 91.07Oceania Cruises 87.99Silversea 87.74Azamara 87.50Celebrity Cruises 86.68Holland America Line 86.42Cunard 86.33Hurtigruten 86.23Marella Cruises 85.60Princess Cruises 84.84P&O Cruises 83.29Carnival Cruise Line 80.56Norwegian Cruise Line 80.01Royal Caribbean International 79.51MSC Cruises 76.15Costa Cruises 72.18Small Ships (fewer than 500 passengers) Emerald Cruises 95.27Paul Gaugin Cruises 92.94American Cruise Line 92.88Sea Cloud Cruises 91.94Windstar Cruises 91.87Ponant 91.45Seabourn 91.34Silversea 89.93SeaDream Yacht Club 89.66Variety Cruises 86.75The Ritz-Carlton Yacht Collection 86.58Star Clippers 81.92Regent Seven Seas Cruises 76.15River Ships Viking 97.32American Cruise Lines 96.66Tauck River Cruising 96.14Oberoi 95.91Les Bateaux Belmond 95.90Grand Circle Cruise Line 95.69Pandaw 95.28Uniworld River Cruises 93.24Sanctuary Retreats 93.14AMAWaterways 93.09Scenic Luxury Cruises & Tours 90.09Sonesta 89.57Avalon Waterways 88.09Emerald Cruises 86.54American Queen Voyages 81.89A-ROSA 73.03Expedition Ships Viking 96.52UnCruise Adventures 96.41Aqua Expeditions 95.97Ecoventura 95.82Scenic Luxury Cruises & Tours 95.80Celebrity Cruises 95.38Quasar Expeditions 94.91Metropolitan Touring 94.71Seabourn 93.37Quark Expeditions 93.15Ponant 92.25Hurtigruten 91.87Silversea 91.81Lindblad Expeditions 91.23Alaskan Dream Cruises 80.77