do you mean countries resided or countries visited? I think its PCC for countries you have lived/resided in for over 6 months. If you just visited a country maybe for leisure or business you do not need a PCC for that country as u never lived there. CIC considers you a resident of a place or country if you are/were legally allowed to stay there. if you have a visitor's status you are not a resident
Please check my clarification in last few posts. In my opinion, CIC would want PCC from any country where you have spent close to 6 months ( in total) on any status.