|
| year | consumption | change |
| 1980 | 88.18 | NA |
| 1981 | 200.98 | 127.91 % |
| 1982 | 151.02 | -24.86 % |
| 1983 | 408.36 | 170.41 % |
| 1984 | 449.12 | 9.98 % |
| 1985 | 587.25 | 30.75 % |
| 1986 | 468.48 | -20.22 % |
| 1987 | 638.24 | 36.24 % |
| 1988 | 677.00 | 6.07 % |
| 1989 | 2,085.36 | 208.03 % |
| 1990 | 2,502.25 | 19.99 % |
| 1991 | 2,546.20 | 1.76 % |
| 1992 | 2,758.71 | 8.35 % |
| 1993 | 1,963.33 | -28.83 % |
| 1994 | 2,622.40 | 33.57 % |
| 1995 | 2,668.70 | 1.77 % |
| 1996 | 3,274.97 | 22.72 % |
| 1997 | 2,583.82 | -21.10 % |
| 1998 | 2,613.58 | 1.15 % |
| 1999 | 2,163.84 | -17.21 % |
| 2000 | 3,677.31 | 69.94 % |
| 2001 | 5,108.11 | 38.91 % |
| 2002 | 6,426.48 | 25.81 % |
| 2003 | 8,432.68 | 31.22 % |
| 2004 | 9,662.91 | 14.59 % |
| 2005 | 11,622.76 | 20.28 % |
| 2006 | 12,342.44 | 6.19 % |
| 2007 | 16,049.11 | 30.03 % |
| 2008 | 16,626.76 | 3.60 % |
| 2009 | 18,698.90 | 12.46 % |
| 2010 | 25,530.63 | 36.54 % |
| 2011 | 26,479.72 | 3.72 % |
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