|
| year | consumption | change |
| 1980 | 35.00 | NA |
| 1981 | 34.08 | -2.62 % |
| 1982 | 38.60 | 13.26 % |
| 1983 | 46.02 | 19.21 % |
| 1984 | 41.00 | -10.90 % |
| 1985 | 47.50 | 15.85 % |
| 1986 | 86.98 | 83.12 % |
| 1987 | 60.32 | -30.65 % |
| 1988 | 70.06 | 16.16 % |
| 1989 | 73.10 | 4.33 % |
| 1990 | 80.00 | 9.44 % |
| 1991 | 78.00 | -2.50 % |
| 1992 | 130.59 | 67.43 % |
| 1993 | 90.05 | -31.05 % |
| 1994 | 92.88 | 3.14 % |
| 1995 | 101.35 | 9.12 % |
| 1996 | 102.41 | 1.05 % |
| 1997 | 128.19 | 25.17 % |
| 1998 | 127.13 | -0.83 % |
| 1999 | 155.03 | 21.94 % |
| 2000 | 140.20 | -9.57 % |
| 2001 | 162.80 | 16.12 % |
| 2002 | 189.99 | 16.70 % |
| 2003 | 222.13 | 16.91 % |
| 2004 | 282.17 | 27.03 % |
| 2005 | 187.17 | -33.67 % |
| 2006 | 119.36 | -36.23 % |
| 2007 | 156.09 | 30.77 % |
| 2008 | 122.90 | -21.27 % |
| 2009 | 230.61 | 87.64 % |
| 2010 | 194.44 | -15.68 % |
| 2011 | 145.85 | -24.99 % |
|
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