|
| 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 | 56.45 | NA |
| 1993 | 33.30 | -41.01 % |
| 1994 | 32.43 | -2.61 % |
| 1995 | 27.02 | -16.68 % |
| 1996 | 49.23 | 82.18 % |
| 1997 | 67.42 | 36.95 % |
| 1998 | 63.44 | -5.90 % |
| 1999 | 57.57 | -9.26 % |
| 2000 | 62.48 | 8.53 % |
| 2001 | 81.94 | 31.15 % |
| 2002 | 83.82 | 2.30 % |
| 2003 | 84.67 | 1.02 % |
| 2004 | 85.08 | 0.48 % |
| 2005 | 86.09 | 1.18 % |
| 2006 | | NA |
| 2007 | | NA |
| 2008 | | NA |
| 2009 | | NA |
| 2010 | | NA |
| 2011 | | NA |
|
|