|
| year | consumption | change |
| 1980 | 32.00 | NA |
| 1981 | 49.00 | 53.13 % |
| 1982 | 73.00 | 48.97 % |
| 1983 | 77.38 | 6.00 % |
| 1984 | 82.25 | 6.30 % |
| 1985 | 87.00 | 5.78 % |
| 1986 | 59.00 | -32.18 % |
| 1987 | 58.83 | -0.28 % |
| 1988 | 71.20 | 21.01 % |
| 1989 | 80.00 | 12.37 % |
| 1990 | 82.00 | 2.50 % |
| 1991 | 84.00 | 2.44 % |
| 1992 | 82.99 | -1.20 % |
| 1993 | 94.19 | 13.50 % |
| 1994 | 95.85 | 1.76 % |
| 1995 | 101.57 | 5.97 % |
| 1996 | 113.96 | 12.20 % |
| 1997 | 118.38 | 3.87 % |
| 1998 | 117.74 | -0.54 % |
| 1999 | 124.52 | 5.76 % |
| 2000 | 141.72 | 13.81 % |
| 2001 | 148.32 | 4.66 % |
| 2002 | 151.43 | 2.10 % |
| 2003 | 152.14 | 0.47 % |
| 2004 | 156.52 | 2.88 % |
| 2005 | 147.65 | -5.66 % |
| 2006 | 167.00 | 13.11 % |
| 2007 | 180.39 | 8.01 % |
| 2008 | 182.86 | 1.37 % |
| 2009 | 177.25 | -3.07 % |
| 2010 | 194.44 | 9.70 % |
| 2011 | 171.07 | -12.02 % |
|
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