When did DC get 3 electoral votes?

Under the

Twenty-third Amendment to the United States Constitution,

Washington, D.C. is allocated as many electors as it would have if

it were a state, (but no more electors than the least populous

state). Since every state has at least 3 electoral votes,

Washington, D.C. is allocated 3 electoral votes.

It is

theoretically possible for Washington, D.C. to have more than 3

electoral votes. However, for that to happen the population in

Washington, D. C. would have to be greater than the population in

each of the U.S. states that have only 1 representative in the U.S.

House of Representatives. Based on the size of Washington, D.C.,

that will not happen.