Drop chances

ItemStage 10Stage 50Stage 100Avg count
Coal43%43%43%6.48
Rotting Flesh30%30%30%0.61
Charred Meat18%18%18%0.27
Cooking Pot4.4%4.4%4.4%0.04
Cooking Grill4.3%4.3%4.3%0.04
Cornmeal1.0%1.0%1.0%0.01
Chrysanthemum0.83%0.83%0.83%0.04
Coffee Beans0.78%0.78%0.78%0.02
Goldenrod Flower0.77%0.77%0.77%0.03
Chicken Ration0.14%0.14%0.14%0
Can of Dog Food0.11%0.11%0.11%0
Can of Pasta0.11%0.11%0.11%0
Can of Peas0.11%0.11%0.11%0
Can of Miso0.11%0.11%0.11%0
Old Sham Sandwich0.11%0.11%0.11%0
Can of Pears0.10%0.10%0.10%0
Can of Sham0.09%0.09%0.09%0
Can of Cat Food0.09%0.09%0.09%0
Can of Chili0.09%0.09%0.09%0
Can of Salmon0.09%0.09%0.09%0
Lamb Rations0.09%0.09%0.09%0
Chicken Soup0.09%0.09%0.09%0
Can of Tuna0.08%0.08%0.08%0
Can of Stock0.08%0.08%0.08%0
Large Beef Ration0.07%0.07%0.07%0

Average count per open at loot stage 50. From 40,000 simulated opens per stage; perks that raise loot are not counted.