Yes if it will mean that Puerto Rico has a possession:
Examples:
Puerto Rico's flag
Puerto Rico's population
I am does not need an apostrophe. It is only when you make it into a contraction by dropping the a that you need the apostrophe. It becomes I'm in that situation.
do you need an apostrophe after the s in Koreans
No. The Cannons doesn't need an apostrophe.
No, Christmas Eve does not need an apostrophe.
No, because plurals do not need an apostrophe.
No you don't! Horses does not need an apostrophe.
As a plural, for more than one dad; no, does not need an apostrophe. As a possessive, as in the item belonging to dad, then yes, it does need an apostrophe.
No. Harringtons doesn't need an apostrophe.
The plural "Thursdays" doesn't need an apostrophe.
Lost wages doesn't need an apostrophe.
No, ours does not need an apostrophe (ever).The piano at the church had been ours.
If you're talking about more than one employee, then don't use an apostrophe. Plural words should never have an apostrophe. If you're talking about something that belongs to a single employee (such as "the employee's computer") then you need an apostrophe.