M.E. Wolfe 2006 In 2005, the value of coal and industrial minerals sold in Ohio amounted to $1.5 billion, an increase of 7% from 2004. Coal production for the year increased 4.7% from 2004, totalling 22.3 Mt. Aggregate production totalled 114 Mt, a 4% decrease from 2004. In 2005, the state's salt sales amounted to $132 million. Production of industrial sandstone and conglomerate as well as dimension stone and limestone also increased. application/pdf en State summaries: Ohio article