This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

Schwarzenegger, who dreamed of moving to the U.S. since the age of 10, and saw bodybuilding as the avenue through which to do so, realized his dream by moving to the United States in September 1968 at the age of 21, speaking little English. There he trained at Gold's Gym in Venice, Los Angeles, California, under Joe Weider. From 1970 to 1974, one of Schwarzenegger's weight training partners was Ric Drasin, a professional wrestler who designed the original Gold's Gym logo in 1973. Schwarzenegger also became good friends with professional wrestler Superstar Billy Graham. In 1970, at age 23, he captured his first Mr. Olympia title in New York, and would go on to win the title a total of seven times.
How old was Schwarzenegger when he started hoping he'd move to America?