When does it started ? Do you have law prohibiting smoking in public place like restaurant, transports, nigth club, office, etc ?

Pretty much this. From the late 80’s more and more smoking bans were put into place. Public buildings, any private business, public transport, etc.

It’s at the point now that the only places you can smoke are your own house (even the apartment buildings I’ve been to have no smoking rules. Like, even in your own apartment) or outside (as long as it’s x feet/meters away from a building’s entrance).