|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 4.56 | NA |
| 1987 | 4.78 | 4.94 % |
| 1988 | 5.35 | 11.82 % |
| 1989 | 5.38 | 0.59 % |
| 1990 | 5.91 | 9.83 % |
| 1991 | 6.26 | 5.83 % |
| 1992 | 6.47 | 3.38 % |
| 1993 | 6.64 | 2.63 % |
| 1994 | 8.51 | 28.25 % |
| 1995 | 8.71 | 2.34 % |
| 1996 | 8.92 | 2.45 % |
| 1997 | 9.00 | 0.90 % |
| 1998 | 9.49 | 5.43 % |
| 1999 | 11.37 | 19.76 % |
| 2000 | 22.00 | 93.55 % |
| 2001 | 14.34 | -34.85 % |
| 2002 | 14.24 | -0.68 % |
| 2003 | 15.67 | 10.04 % |
| 2004 | 12.58 | -19.70 % |
| 2005 | 12.53 | -0.40 % |
| 2006 | 23.33 | 86.17 % |
| 2007 | 25.84 | 10.76 % |
| 2008 | 29.30 | 13.41 % |
| 2009 | 32.08 | 9.47 % |
| 2010 | 35.74 | 11.42 % |
|
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