Petroleum imports numbers all sources

U.S. Crude Oil Imports from All Countries (Thousand Barrels)

Decade /Year

1967 411,649

1977 1,935,012

1987 1,705,922

1997 3,002,299

2007 3,656,170

The chart indicates a doubling of imported oil in twenty years. Population has doubled since the sixties. How is the US going to maintain per capita consumption at these levels? How can a market keep up without planning to mitigate severe changes?

Update:
Exports of crude to elswhere (thousand barrels)

1967 26,451

1977 2,146

1987 54,964

1997 39,308

2007 8,999

The charts do not translate to the post, so I picked 2007 and simply worked backwards by decade as an illustration.