At least since the 50's according to John Stormer of 'None Dare Call It Treason' (a book every American should read and research!!!):

"Since 1956,American aid has provided about half of Communist Yugoslavia's national income. In 1961, they instituted their own foreign aid program to spread communism to under-developed nations of the world. (1)

Poland and Yugoslavia were not the only Communists to benefit from Eisenhower's generosity. Achmed Sukarno received the planes, tanks, and guns he used to crush  the last anti-Communist resistance in Indonesia from Eisenhower's mutual security program. (2)  Since 1955, Sukarno Indonesian government has received $479-million from the United States. (3)

Patrice Lumumba was widely known as a Communist terrorist in 1960 when he became Premier of the newly independent Congo in Africa. Eisenhower and the U.S. State Department gave Lumumba's prestige and his treasury a big boost with a Washington welcome and $20-million in American foreign aid. (4) Even so, he was deposed and later killed by the anti-Communist forces in the Congolese government.

By the time Eisenhower's two terms ended, direct economic and military aid to Communist and "neutralist" nations totaled over $7-billion."

(1) Yugoslav Communism, A Critical Study, SISS, Oct. 18, 1961, pg. 258-9,282

(2) Morris, No Wonder We Are Losing, pg. 207

(3) Report, U.S. Foreign Assistance, Agency For International Dev., Mar. 21, 1961, pg. 38

(4) Ibid., pg. 89