When was the last referendum among puerto ricans, declaring endorsement for the current relationship between that entity and the u. s.? 1852 1998 1952 1905

1998

Explanation:

In 1998 in Puerto Rico, to be more specific December 13th, the population was called to vote in a referendum to check how they felt about the politic relationship that they had with the United States, and their status of protectorate, the result of the referendum was non of the above, the question was how they´d felt more comfortable with the situation between Puerto Rico and USA, the options were:

State

Associate State

Independence

Free association

None of the above.