The national average price per gallon of diesel gasoline fell after seeing gains over the previous two weeks, according to data issued this week by the Department of Energy’s Energy Information Administration (EIA). Falling 2.7 cents, the national average, for the week of September 15, came in at $3.739, following a 3.2-cent increase, to $3.7666, for the week of September 8, and a 2.6-cent increase, to $3.734, for the week of September 1, and hitting its highest weekly average since the week of July 28, at $3.805. Which was preceded by 0.005-cent decline, to $3.708, for the week of August 25. On an annual basis, the national average increased 21.3 cents, ahead of the 21.1-cent annual increase, for the week of September 8. WTI crude is currently trading at $63.82 on the New York Mercantile Exchange, up from $63.09 a week ago at this time.