I like this site for information on nutritional valve of foods. Once there, click on "Nutritional Database for Standard Reference".

http://www.ars.usda.gov/main/site_main.htm?modecode=12354500

Thanks Ned for the link. I have used that myself sometime ago.

Here's also another nutritional site that I love to use. It has both cooked version and raw versions of fruits, even kumquats, but then again, I am suspecting that it is only the kumquat juices and not including the rinds due to the unusually low fat content in the analysis.

http://www.nutritiondata.com/facts-C00001-01c20VD.html