http://www.washingtonpost.com/busine...5QP_story.html

Ron's numbers are for 2009. Vacuum tubes have slipped to #4 now, alas That fuel is now #1 was a big story last week.

2011 (Through October)
1 Fuel: $73.4 billion;
2 Aircraft: $70.8 billion;
3 Motor Vehicles: $39.6 billion;
4 Vacuum Tubes: $37.1 billion;
5 Telecommunications Equipment: $33.2 billion.