|
| year | consumption | change |
| 1980 | 83.78 | NA |
| 1981 | 111.33 | 32.89 % |
| 1982 | 139.99 | 25.74 % |
| 1983 | 124.56 | -11.02 % |
| 1984 | 139.99 | 12.39 % |
| 1985 | 149.91 | 7.09 % |
| 1986 | 125.66 | -16.18 % |
| 1987 | 84.88 | -32.46 % |
| 1988 | 74.96 | -11.69 % |
| 1989 | 91.49 | 22.06 % |
| 1990 | 91.49 | 0.00 % |
| 1991 | 97.00 | 6.02 % |
| 1992 | 95.90 | -1.14 % |
| 1993 | 78.26 | -18.39 % |
| 1994 | 71.65 | -8.45 % |
| 1995 | 80.47 | 12.31 % |
| 1996 | 65.04 | -19.18 % |
| 1997 | 63.93 | -1.69 % |
| 1998 | 66.14 | 3.45 % |
| 1999 | 211.64 | 220.00 % |
| 2000 | 639.34 | 202.08 % |
| 2001 | 707.68 | 10.69 % |
| 2002 | 541.23 | -23.52 % |
| 2003 | 943.58 | 74.34 % |
| 2004 | 514.78 | -45.44 % |
| 2005 | 632.73 | 22.91 % |
| 2006 | 807.99 | 27.70 % |
| 2007 | 854.29 | 5.73 % |
| 2008 | 737.45 | -13.68 % |
| 2009 | 683.43 | -7.32 % |
| 2010 | 756.19 | 10.65 % |
| 2011 | 1,559.77 | 106.27 % |
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