11. November natural gas rose 9.6 cents to $ 3.064 per million British thermal units . 12. February natural gas plunged 31.9 cents to $ 2.49 each million British thermal units . 13. January natural gas fell 15.2 cents to $ 6.668 per million British thermal units . 14. October natural gas fell 5.7 cents to $ 1.644 per million British thermal units . 15. November natural gas fell 77.6 cents to $ 7.626 per million British thermal units . 16. She said in December 1999, gas cost $ 2.36 per million British thermal units . 17. November natural gas fell 4.8 cents to $ 6.803 per million British thermal units . 18. November natural gas declined 21.5 cents to $ 7.89 per million British thermal units . 19. It was 22.8 trillion cubic feet, not British thermal units . 20. February natural gas fell 4.3 cents to $ 2.125 per million British thermal units .
