That's not too surprising. Fruits and vegetables are great in the modern world because they don't provide the same amount of calories per serving. Lets face it a lot of Americans are fat and can stand to eat foods that don't contain a lot of calories. Canned foods are in a way worse because so much of the weight and volume is water. Survival situation food essentials are fats, protein, and carbohydrates. There was something I read about survival cooking (and I really wish I could find the site again). One of the things that was mentions was the situation of a soldier evading in enemy territory. If forced to steal food from a house avoid canned vegetables and go after fat (bacon grease, crisco, etc.) first, then things like beans, then sugar because they have high calorie to weight ratios. It was an excellent way to make the point of what makes a good survival food, as I mentioned I really wish I could find the site again.

I don't have a lot in the way of survival food supplies outside of my winter car kit because I live in the dorms. But canned meat or summer sausage, olive oil or crisco, beans, brown sugar, and because I get bored with food a well stocked spice rack would be at the top of my list. As you pointed out quantitatively with your figures, canned veggies just don't cut it.