Gasoline consumption in WV on decline?

So before I get out of here for the weekend, I decide to look up one more database. Some guys like to watch sports. I like to play with numbers.

According to the Energy Information Administration, the consumption of gasoline in West Virginia appears to be on a downward trend. Take a look at this chart to see what I mean. It looks like July sales peaked in 1997, rebounded in 1999 and have trended downward ever since.

We all have ideas, but I really don't think prices are among them. At least, not among the chief reasons.

You can get to the basic page for pulling info here, if you want to look at other states.