...Yes, Aleekat is correct, any 12 volt auto system is good for comparison.
.... and it seems he also has a '96, which measures 14.3v... this seems more correct to me. I would be inclined to think the alternator on the 2000 is not regulating correctly. In North America, I would suggest one to replace the alternator. Easily done here. I don't know what is the best solution there.