The post-war years would be ones of great prosperity and growth on the west coast of North America. The quick reemergence of Japan and its stunning growth over the next decades meant great wealth for the west coast ports. Japan became the second largest trading partner of both Canada and the United States, and this trade was almost entirely based in the west coast (the United States and Canada are each other's largest trading partners). Later the other Asian economies would add to this trade. Throughout the Pacific Northwest, the primary extractive activities of logging, mining, and fishing remained the central industries. California became a center of entertainment, aerospace engineering, and electronics. Following Alaska's admission to the Union in 1959, military spending, the development of Cook Inlet oil industry, and rebuilding after the 1964 earthquake fueled the state's economic growth in the 1960s.