Before Alaska and Hawaii became states of the United States in 1959, the corresponding expression was "the 49th state".\n\nBased on this passage, when did the us add the 49th state? Let's think fast. Stream of consciousness:
User
The relevant sentence in the passage is: Before Alaska and Hawaii became states of the United States in 1959, the corresponding expression was "the 49th state". So the final answer is 1959.
Assistant