text: The International Energy Agency reports the following typical higher heating values per Standard cubic metre of gas:
  * Algeria: 39.57MJ/Sm
  * Bangladesh: 36.00MJ/Sm
  * Canada: 39.00MJ/Sm
  * China: 38.93MJ/Sm
  * Indonesia: 40.60MJ/Sm
  * Iran: 39.36MJ/Sm
  * Netherlands: 33.32MJ/Sm
  * Norway: 39.24MJ/Sm
  * Pakistan: 34.90MJ/Sm
  * Qatar: 41.40MJ/Sm
  * Russia: 38.23MJ/Sm
  * Saudi Arabia: 38.00MJ/Sm
  * Turkmenistan: 37.89MJ/Sm
  * United Kingdom: 39.71MJ/Sm
  * United States: 38.42MJ/Sm
  * Uzbekistan: 37.89MJ/Sm
  The lower heating value of natural gas is normally about 90% of its higher heating value. This table is in Standard cubic metres (1atm, 15°C), to convert to values per Normal cubic metre (1atm, 0°C), multiply above table by 1.0549.