SThis chart summarizes the supply changes that occurred since 1995 to meet changing demand for both gasoline and distillate in the U.S. and Europe.
	SDemand changes are met by changes in net imports and changes in refinery production. Refinery production changes are broken down into the volumes affected by changes in yield, and those resulting from changes in crude runs.  The yield changes stem from combinations of changing refinery unit operations, changing types of crude oils, and installation of new processing units.
	SOn the left, the chart shows that the U.S increased gasoline demand has been met by increasing refinery input and imports, with yield changes making a very small contribution. By comparison, increased refinery production from yield improvements played a large role in helping to meet distillate demand.  U.S. refinery distillate yield improvement ranked a little below increased refinery inputs and well above imports as a supply contributor.
	SIn EU-15 countries, refinery production’s contribution to European gasoline demand remained almost unchanged, as production from increased refinery inputs were counter balanced by declines in production from declines in yield.  Excess product was exported.  For distillate, increased refinery production from both increased throughputs and yields provided about half the added product need, and the other half came from imports.