|
| year | consumption | change |
| 1980 | 105.00 | NA |
| 1981 | 134.00 | 27.62 % |
| 1982 | 91.00 | -32.09 % |
| 1983 | 182.00 | 100.00 % |
| 1984 | 241.00 | 32.42 % |
| 1985 | 377.00 | 56.43 % |
| 1986 | 431.00 | 14.32 % |
| 1987 | 579.52 | 34.46 % |
| 1988 | 621.25 | 7.20 % |
| 1989 | 701.71 | 12.95 % |
| 1990 | 663.00 | -5.52 % |
| 1991 | 790.00 | 19.16 % |
| 1992 | 902.00 | 14.18 % |
| 1993 | 797.55 | -11.58 % |
| 1994 | 765.28 | -4.05 % |
| 1995 | 875.46 | 14.40 % |
| 1996 | 958.80 | 9.52 % |
| 1997 | 1,024.14 | 6.81 % |
| 1998 | 1,073.22 | 4.79 % |
| 1999 | 1,093.71 | 1.91 % |
| 2000 | 1,109.95 | 1.49 % |
| 2001 | 1,147.03 | 3.34 % |
| 2002 | 1,286.88 | 12.19 % |
| 2003 | 1,337.73 | 3.95 % |
| 2004 | 1,420.02 | 6.15 % |
| 2005 | 1,456.74 | 2.59 % |
| 2006 | 1,521.72 | 4.46 % |
| 2007 | 1,736.44 | 14.11 % |
| 2008 | 2,099.12 | 20.89 % |
| 2009 | 2,068.72 | -1.45 % |
| 2010 | 2,137.97 | 3.35 % |
| 2011 | 2,662.86 | 24.55 % |
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