|
| year | consumption | change |
| 1980 | 491.63 | NA |
| 1981 | 741.86 | 50.90 % |
| 1982 | 666.90 | -10.10 % |
| 1983 | 579.82 | -13.06 % |
| 1984 | 799.18 | 37.83 % |
| 1985 | 795.87 | -0.41 % |
| 1986 | 693.35 | -12.88 % |
| 1987 | 642.65 | -7.31 % |
| 1988 | 552.26 | -14.07 % |
| 1989 | 572.10 | 3.59 % |
| 1990 | 586.43 | 2.50 % |
| 1991 | 493.84 | -15.79 % |
| 1992 | 346.13 | -29.91 % |
| 1993 | 287.70 | -16.88 % |
| 1994 | 291.01 | 1.15 % |
| 1995 | 311.95 | 7.20 % |
| 1996 | 234.79 | -24.73 % |
| 1997 | 180.78 | -23.00 % |
| 1998 | 149.91 | -17.07 % |
| 1999 | 157.63 | 5.15 % |
| 2000 | 227.08 | 44.06 % |
| 2001 | 243.61 | 7.28 % |
| 2002 | 224.87 | -7.69 % |
| 2003 | 231.49 | 2.94 % |
| 2004 | 221.56 | -4.29 % |
| 2005 | 261.25 | 17.91 % |
| 2006 | 271.17 | 3.80 % |
| 2007 | 318.57 | 17.48 % |
| 2008 | 287.70 | -9.69 % |
| 2009 | 267.86 | -6.90 % |
| 2010 | 271.17 | 1.23 % |
| 2011 | 278.88 | 2.85 % |
|
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