The chart shows one column for 2010 and one for 2020. Within each column are bands of color which represent the eight different commodity categories: Crude Oil, Empty Gas (Abandoned), Empty Liquid (Abandoned), Liquefied Petroleum Gas, Natural Gas, Natural Gas Liquid, Other Highly Votatile Liquid, and Non-Highly Volatile Product. The band widths vary based on each commodity's percent of the overall total pipeline miles in the OKI Region. In 2020, more than half of the transmission pipeline miles in the OKI region were carrying natural gas. The largest commodity change, which occurred between 2010 and 2020, is the increase in pipeline miles dedicated to the category of Other Highly Volatile Liquid.