|
| year | consumption | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | 3.63 | NA |
| 1986 | 3.60 | -0.91 % |
| 1987 | 4.26 | 18.31 % |
| 1988 | 4.72 | 10.88 % |
| 1989 | 5.71 | 21.06 % |
| 1990 | 6.43 | 12.57 % |
| 1991 | 7.22 | 12.17 % |
| 1992 | 8.40 | 16.42 % |
| 1993 | 8.23 | -2.03 % |
| 1994 | 8.23 | 0.00 % |
| 1995 | 8.23 | 0.00 % |
| 1996 | 8.23 | 0.00 % |
| 1997 | 9.27 | 12.66 % |
| 1998 | 9.49 | 2.32 % |
| 1999 | 9.49 | 0.00 % |
| 2000 | 13.97 | 47.20 % |
| 2001 | 11.53 | -17.41 % |
| 2002 | 11.08 | -3.94 % |
| 2003 | 11.08 | 0.00 % |
| 2004 | 13.49 | 21.72 % |
| 2005 | 14.52 | 7.65 % |
| 2006 | 15.20 | 4.66 % |
| 2007 | 15.59 | 2.59 % |
| 2008 | 19.06 | 22.26 % |
| 2009 | 18.38 | -3.58 % |
| 2010 | 19.36 | 5.33 % |
| 2011 | 15.00 | -22.51 % |
|
|