During our galley tour on the cruise ship (Dawn Princess), we were given a little brochure with tons of stats which I thought I'd share with you:
Average amount of fish prepared every day: 1,100 lbs
Poultry: 900 lbs, veal: 120 lbs, beef: 1,000 lbs, lamb: 150 lbs, pork: 600 lbs.
Average amount of flour used daily: 1,300 lbs
Average amount of fresh fruits served daily: 4,200 lbs
Average amount of dishes washed daily: 50,100
And, from what I read somewhere else:
Average weight gained on a 7 weeks cruise: 5 lbs