|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 30.73 | NA |
| 1987 | 39.79 | 29.51 % |
| 1988 | 32.45 | -18.45 % |
| 1989 | 42.81 | 31.92 % |
| 1990 | 45.00 | 5.12 % |
| 1991 | 40.40 | -10.21 % |
| 1992 | 78.06 | 93.21 % |
| 1993 | 61.94 | -20.65 % |
| 1994 | 97.05 | 56.68 % |
| 1995 | 44.23 | -54.42 % |
| 1996 | 65.22 | 47.45 % |
| 1997 | 75.58 | 15.88 % |
| 1998 | 79.74 | 5.50 % |
| 1999 | 80.52 | 0.99 % |
| 2000 | 80.27 | -0.31 % |
| 2001 | 110.28 | 37.38 % |
| 2002 | 69.83 | -36.68 % |
| 2003 | 56.29 | -19.39 % |
| 2004 | 56.87 | 1.03 % |
| 2005 | 65.03 | 14.35 % |
| 2006 | 53.19 | -18.21 % |
| 2007 | 61.62 | 15.85 % |
| 2008 | 61.83 | 0.33 % |
| 2009 | 113.16 | 83.02 % |
| 2010 | 131.36 | 16.09 % |
|
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