Central planning becomes more difficult as an economy grows because the outputs of many industries serve as inputs to others, so failure to meet output targets in one industry causes repercussions across industries. Planning techniques that worked for simpler economies proved inadequate and inefficient as economies expanded in size and complexity of interdependent industries. Russia, while one of the world's largest car producers, saw a nearly 60% decline in production from 2008 to 2009 due to the global financial crisis.