How much salt is normally added to a cooking wine?

I am so annoyed, I have cooked a dish for my 1 1/2 year old girls to share in and added white cooking wine for flavour. Then looked at the ingredients and remembered there is salt! I am not giving it to them, but I am the type of person who likes to know and they do not provide nutritional info on the label like producers are normally required to do especially with salty condiments. I really want to know the salt content, which the label does not tell us. However, from now on I am never cooking with cooking wines anyway, because they are really horrible.