|
| year | consumption | change |
| 1980 | 43.00 | NA |
| 1981 | 53.04 | 23.35 % |
| 1982 | 32.00 | -39.67 % |
| 1983 | 47.00 | 46.88 % |
| 1984 | 52.00 | 10.64 % |
| 1985 | 50.00 | -3.85 % |
| 1986 | 40.00 | -20.00 % |
| 1987 | 43.20 | 8.00 % |
| 1988 | 24.01 | -44.42 % |
| 1989 | 50.15 | 108.87 % |
| 1990 | 80.00 | 59.52 % |
| 1991 | 105.00 | 31.25 % |
| 1992 | 114.66 | 9.20 % |
| 1993 | 111.24 | -2.98 % |
| 1994 | 140.55 | 26.35 % |
| 1995 | 150.80 | 7.29 % |
| 1996 | 156.80 | 3.98 % |
| 1997 | 186.82 | 19.14 % |
| 1998 | 218.95 | 17.20 % |
| 1999 | 220.37 | 0.65 % |
| 2000 | 242.61 | 10.10 % |
| 2001 | 241.55 | -0.44 % |
| 2002 | 287.11 | 18.86 % |
| 2003 | 293.47 | 2.21 % |
| 2004 | 352.44 | 20.10 % |
| 2005 | 367.63 | 4.31 % |
| 2006 | 375.40 | 2.11 % |
| 2007 | 402.24 | 7.15 % |
| 2008 | 411.77 | 2.37 % |
| 2009 | 427.31 | 3.77 % |
| 2010 | 535.38 | 25.29 % |
| 2011 | 572.46 | 6.93 % |
|
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