|
| year | consumption | change |
| 1980 | 657.21 | NA |
| 1981 | 560.31 | -14.74 % |
| 1982 | 667.56 | 19.14 % |
| 1983 | 500.01 | -25.10 % |
| 1984 | 560.26 | 12.05 % |
| 1985 | 546.26 | -2.50 % |
| 1986 | 597.67 | 9.41 % |
| 1987 | 504.89 | -15.52 % |
| 1988 | 566.20 | 12.14 % |
| 1989 | 447.01 | -21.05 % |
| 1990 | 344.31 | -22.97 % |
| 1991 | 355.48 | 3.24 % |
| 1992 | 449.90 | 26.56 % |
| 1993 | 353.70 | -21.38 % |
| 1994 | 155.06 | -56.16 % |
| 1995 | 156.99 | 1.25 % |
| 1996 | 252.08 | 60.57 % |
| 1997 | 350.42 | 39.01 % |
| 1998 | 226.83 | -35.27 % |
| 1999 | 137.70 | -39.30 % |
| 2000 | 141.10 | 2.47 % |
| 2001 | 146.61 | 3.91 % |
| 2002 | 151.02 | 3.01 % |
| 2003 | 159.84 | 5.84 % |
| 2004 | 119.05 | -25.52 % |
| 2005 | 154.32 | 29.63 % |
| 2006 | 63.93 | -58.57 % |
| 2007 | 15.43 | -75.86 % |
| 2008 | 1.10 | -92.86 % |
| 2009 | 1.10 | 0.00 % |
| 2010 | 1.10 | 0.00 % |
| 2011 | 1.10 | 0.00 % |
|
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