Structural economic changes, however, were unable to check the slowing of economic growth as the economy matured in the late 1970s and 1980s, attaining annual growth rates at only 4–6%. But these rates were remarkable in a world of expensive petroleum and in a nation of few natural resources. Japan's average growth rate of 5% in the late 1980s, for example, was far higher than the 3.8% growth rate of the United States.