|
| year | consumption | change |
| 1980 | 132.28 | NA |
| 1981 | 90.39 | -31.67 % |
| 1982 | 71.65 | -20.73 % |
| 1983 | 106.92 | 49.23 % |
| 1984 | 113.54 | 6.19 % |
| 1985 | 195.11 | 71.84 % |
| 1986 | 192.90 | -1.13 % |
| 1987 | 170.86 | -11.43 % |
| 1988 | 187.39 | 9.68 % |
| 1989 | 228.18 | 21.76 % |
| 1990 | 180.78 | -20.77 % |
| 1991 | 194.01 | 7.32 % |
| 1992 | 187.39 | -3.41 % |
| 1993 | 187.39 | 0.00 % |
| 1994 | 181.88 | -2.94 % |
| 1995 | 181.88 | 0.00 % |
| 1996 | 185.19 | 1.82 % |
| 1997 | 124.56 | -32.74 % |
| 1998 | 132.28 | 6.19 % |
| 1999 | 122.36 | -7.50 % |
| 2000 | 279.99 | 128.83 % |
| 2001 | 285.50 | 1.97 % |
| 2002 | 304.24 | 6.56 % |
| 2003 | 345.02 | 13.41 % |
| 2004 | 309.75 | -10.22 % |
| 2005 | 286.60 | -7.47 % |
| 2006 | 311.95 | 8.85 % |
| 2007 | 268.96 | -13.78 % |
| 2008 | 404.55 | 50.41 % |
| 2009 | 278.88 | -31.06 % |
| 2010 | 278.88 | 0.00 % |
| 2011 | 278.88 | 0.00 % |
|
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