Subject

Natural gas used

(billion m3)

Calorific value (billion MJ)

Average

Year

min. 32 MJ/m3

max. 42 MJ/m3

37 MJ/m3

1935

0.071

2272

2982

2627

1958

0.400

12,800

16,800

14,800

1980

1.531

48,992

64,302

56,647

2013

3479

111,328

146,118

128,723