Oh, I stand corrected. It does say that. I ctrl-F'ed a version I printed as a PDF for "200", and for some reason that page is blank in my copy.
Still, the question remains, how do you end up with 200 countries? I think even being fully inclusive you only get to about 196.
Ask a Scot or a Welshman which country they live in; neither Scotland nor Wales (or NI or England) are technically countries but all of their inhabitants would claim they were, with separate cultures and identities. So, you are hitting 200 before you start with independent territories such as Puerto Rico, Bermuda etc and semi-autonomous regions like HK and Macau.
But if we are nit-picking this 'factoid' then next stop punctuation.
