The US steel industry experienced severe contraction after 1973, with demand peaking and not reaching the same levels for over 20 years. While integrated steel firms faced high exit barriers, minimills were able to gain market share through new technologies allowing them to use scrap steel. The integrated steel industry saw many bankruptcies and plant closings from the 1970s through the early 2000s as it struggled with declining demand and increased imports. Mergers in the industry generally did not create efficient competitors able to survive, with the last integrated steel plant closing in 2001.