|
| year | consumption | change |
| 1980 | 244.00 | NA |
| 1981 | 100.00 | -59.02 % |
| 1982 | 100.00 | 0.00 % |
| 1983 | 124.00 | 24.00 % |
| 1984 | 144.00 | 16.13 % |
| 1985 | 140.00 | -2.78 % |
| 1986 | 191.00 | 36.43 % |
| 1987 | 284.17 | 48.78 % |
| 1988 | 351.03 | 23.53 % |
| 1989 | 415.30 | 18.31 % |
| 1990 | 256.00 | -38.36 % |
| 1991 | 18.00 | -92.97 % |
| 1992 | 92.53 | 414.03 % |
| 1993 | 191.41 | 106.87 % |
| 1994 | 210.83 | 10.15 % |
| 1995 | 210.83 | 0.00 % |
| 1996 | 328.43 | 55.78 % |
| 1997 | 327.37 | -0.32 % |
| 1998 | 317.84 | -2.91 % |
| 1999 | 305.12 | -4.00 % |
| 2000 | 339.02 | 11.11 % |
| 2001 | 300.18 | -11.46 % |
| 2002 | 282.52 | -5.88 % |
| 2003 | 321.37 | 13.75 % |
| 2004 | 342.56 | 6.59 % |
| 2005 | 434.37 | 26.80 % |
| 2006 | 438.26 | 0.89 % |
| 2007 | 425.90 | -2.82 % |
| 2008 | 448.50 | 5.31 % |
| 2009 | 402.91 | -10.17 % |
| 2010 | 445.78 | 10.64 % |
| 2011 | 502.21 | 12.66 % |
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