Calcium sources per 200 calories

Using the search tool at http://www.nutritiondata.com, I searched for foods highest in calcium per 200 calories in all categories. I wanted to get the truth about the relative calcium contribution of milk vs. other foods.
Listed below are some grossly simplified search conclusions of mine, followed by selections from the list. This format doesn't make it easy to know how much calcium you got today, but it does make it easy to see how much calcium you would relatively get by supplying your daily calories using different foods. I hope I get the energy to do the same thing by calcium per 100-grams. That will make nuts, meats, and cheeses look great, I bet.
By the way, don't overlook the dietary calcium contribution of hard water.

Conclusions:

• After removing non-caloric foods like salt from the top of the list, Mozzarella cheese is the first dairy product at number 42. Non-fat milk is number 57.
• Lumping food groups as calcium sources and estimating the median calcium content, I get vegetables 200-1500, dairy 200-1000, fruit 250-500, fish 50-400, nuts 15-100, grains 30-60, eggs 30, beef 10-30
• Boiling apparently leaches calcium out of food. All boiled food variations were lower in calcium.
• By this measure, it looks like leafy green vegetables and cheeses are the super sources, cow milk and lots of varied vegetables are the good sources, fruits and legumes are generally the okay sources, and most fishes and nuts are poor sources.

Selections:

mg of Calcium per 200 calories	Food
1290	Cheese, mozzarella, nonfat
1183	Spinach, cooked, boiled, drained, with salt (many greens are high measuring by calories)
900	Spinach, frozen, chopped or leaf, cooked, boiled, drained, with salt
698	Milk, nonfat, fluid, protein fortified, with added vitamin A (fat free and skim)
581	Yogurt, plain, low fat, 12 grams protein per 8 ounce
431	Broccoli, frozen, chopped, unprepared
407	Fish, salmon, pink, canned, drained solids with bone (highest fish except mollusk)
340	Seeds, sesame seeds, whole, dried
377	Milk, whole, 3.25% milkfat
340	Seeds, sesame seeds, whole, dried
365	Tomatoes, red, ripe, canned, packed in tomato juice
343	Peppers, chili, green, canned
305	Beans, snap, green, frozen, all styles, microwaved (green beans)
270	Milk, chocolate, fluid, commercial, whole
257	Lettuce, iceberg
253	Nuts, coconut water (liquid from coconuts)
243	Squash, summer, zucchini, includes skin, frozen, cooked, boiled, drained, with salt
236	Peas, edible-podded, frozen, cooked, boiled, drained, with salt [Snowpeas, Sugar snap peas]
220	Limes, raw
205	Squash, winter, butternut, cooked, baked, with salt
183	Carrots, baby, raw
163	Yogurt, chocolate, nonfat milk
174	Fish, perch, mixed species, cooked, dry heat
130	Beans, white, mature seeds, cooked, boiled, with salt
91	Milk, human, mature, fluid
86	Refried beans, canned, fat-free
27	Fish, cod, Atlantic, cooked, dry heat
19	Fish, tuna, light, canned in water, drained solids
20-90	Most other nuts