|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 3.24 | NA |
| 1993 | 3.26 | 0.66 % |
| 1994 | 3.48 | 6.51 % |
| 1995 | 2.64 | -24.10 % |
| 1996 | 2.56 | -2.93 % |
| 1997 | 3.18 | 24.09 % |
| 1998 | 3.62 | 13.97 % |
| 1999 | 4.71 | 29.98 % |
| 2000 | 6.01 | 27.62 % |
| 2001 | 7.20 | 19.85 % |
| 2002 | 8.20 | 13.90 % |
| 2003 | 9.33 | 13.74 % |
| 2004 | 10.65 | 14.13 % |
| 2005 | 10.69 | 0.45 % |
| 2006 | 8.94 | -16.40 % |
| 2007 | 8.14 | -9.00 % |
| 2008 | 9.53 | 17.19 % |
| 2009 | 9.50 | -0.38 % |
| 2010 | 9.48 | -0.17 % |
|
|
