|
| year | consumption | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 75.96 | NA |
| 1993 | 66.41 | -12.58 % |
| 1994 | 62.65 | -5.66 % |
| 1995 | 63.60 | 1.52 % |
| 1996 | 61.97 | -2.57 % |
| 1997 | 66.39 | 7.14 % |
| 1998 | 58.45 | -11.97 % |
| 1999 | 53.83 | -7.90 % |
| 2000 | 62.36 | 15.85 % |
| 2001 | 74.15 | 18.90 % |
| 2002 | 78.46 | 5.82 % |
| 2003 | 86.78 | 10.61 % |
| 2004 | 94.55 | 8.95 % |
| 2005 | 95.59 | 1.10 % |
| 2006 | 94.98 | -0.63 % |
| 2007 | 99.82 | 5.09 % |
| 2008 | 88.45 | -11.40 % |
| 2009 | 83.65 | -5.42 % |
| 2010 | 102.47 | 22.49 % |
| 2011 | 145.00 | 41.51 % |
|
|