So strictly speaking, in answering "How many countries have you visited?", you shouldn't count the country you live in, unless you have visited it when you were living in another country. So for many, should they count Australia?
My total is 59.
I didn't include those I've just passed through on a train, but did include day trips to Monaco and Vatican, as well as Zambia ( I counted this, as we didn't just visit Victoria Falls - Zambian side, but also changed currency, and went into the nearby town - Livingstone - and ate something there).