|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 13.51 | NA |
| 1987 | 13.51 | 0.00 % |
| 1988 | 14.39 | 6.53 % |
| 1989 | 13.38 | -6.99 % |
| 1990 | 15.18 | 13.44 % |
| 1991 | 16.02 | 5.50 % |
| 1992 | 13.37 | -16.53 % |
| 1993 | 13.37 | -0.02 % |
| 1994 | 13.85 | 3.61 % |
| 1995 | 13.23 | -4.50 % |
| 1996 | 9.68 | -26.81 % |
| 1997 | 9.77 | 0.87 % |
| 1998 | 11.73 | 20.08 % |
| 1999 | 14.58 | 24.31 % |
| 2000 | 14.76 | 1.27 % |
| 2001 | 10.59 | -28.27 % |
| 2002 | 12.56 | 18.61 % |
| 2003 | 12.52 | -0.32 % |
| 2004 | 12.31 | -1.71 % |
| 2005 | 8.74 | -28.98 % |
| 2006 | 6.68 | -23.51 % |
| 2007 | 7.86 | 17.64 % |
| 2008 | 8.06 | 2.55 % |
| 2009 | 6.24 | -22.61 % |
| 2010 | 5.96 | -4.45 % |
|
|
