|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 11.75 | NA |
| 1993 | 10.96 | -6.69 % |
| 1994 | 10.21 | -6.82 % |
| 1995 | 10.42 | 2.06 % |
| 1996 | 10.18 | -2.29 % |
| 1997 | 8.41 | -17.43 % |
| 1998 | 8.06 | -4.16 % |
| 1999 | 4.51 | -44.04 % |
| 2000 | 13.95 | 209.26 % |
| 2001 | 13.47 | -3.41 % |
| 2002 | 6.68 | -50.39 % |
| 2003 | 7.36 | 10.14 % |
| 2004 | 7.97 | 8.27 % |
| 2005 | 8.27 | 3.79 % |
| 2006 | 9.18 | 11.02 % |
| 2007 | 9.72 | 5.85 % |
| 2008 | 8.86 | -8.89 % |
| 2009 | 7.34 | -17.15 % |
| 2010 | 6.29 | -14.33 % |
|
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