|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 13.74 | NA |
| 1987 | 25.99 | 89.12 % |
| 1988 | 23.12 | -11.01 % |
| 1989 | 21.38 | -7.54 % |
| 1990 | 24.27 | 13.52 % |
| 1991 | 22.43 | -7.60 % |
| 1992 | 25.54 | 13.88 % |
| 1993 | 25.46 | -0.31 % |
| 1994 | 29.39 | 15.44 % |
| 1995 | 30.84 | 4.91 % |
| 1996 | 34.12 | 10.65 % |
| 1997 | 31.29 | -8.29 % |
| 1998 | 37.30 | 19.22 % |
| 1999 | 37.02 | -0.76 % |
| 2000 | 38.84 | 4.91 % |
| 2001 | 37.60 | -3.20 % |
| 2002 | 39.05 | 3.87 % |
| 2003 | 36.43 | -6.70 % |
| 2004 | 29.18 | -19.91 % |
| 2005 | 26.11 | -10.53 % |
| 2006 | 26.00 | -0.41 % |
| 2007 | 22.21 | -14.59 % |
| 2008 | 19.75 | -11.05 % |
| 2009 | 16.00 | -19.01 % |
| 2010 | 26.13 | 63.36 % |
|
|
