How common is that someone from your country has never been to the capital of the country? Is there the norm that after certain age everyone has been to the capital? Is it normal just for travels or for some other reasons?
In the case of those decentralised countries, you might also tell us how common is it that someone from your country has never been to the capital city of your region / state / province. Like Edinburgh for a Scotsman / Munich for a Bavarian / Sevilla for an Andalusian.