The graph shows mining deaths in the United States during much of the 1900s. A bar graph titled Number of Deaths in U S Mining Industry. The x axis shows Decades, from the 1920's to the 1970's. The y axis shows number of deaths, from 0 to 30,000. 1910's, 25,000; 1920's, 22,500; 1930's, 12,500; 1940's, 11,000; 1950's, 4,800; 1960's, 2,500; 1970's, 1,000. What does the graph demonstrate? The safety of the mining industry declined as the 1900s progressed. The wages for miners increased as the 1900s progressed. The wages for miners declined as the 1900s progressed. The safety of the mining industry improved as the 1900s progressed.