|
| 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 | 6,439.70 | NA |
| 1993 | 4,797.26 | -25.50 % |
| 1994 | 4,886.55 | 1.86 % |
| 1995 | 3,799.67 | -22.24 % |
| 1996 | 3,693.85 | -2.79 % |
| 1997 | 3,077.65 | -16.68 % |
| 1998 | 3,218.75 | 4.58 % |
| 1999 | 3,194.50 | -0.75 % |
| 2000 | 3,839.35 | 20.19 % |
| 2001 | 3,955.09 | 3.01 % |
| 2002 | 3,949.58 | -0.14 % |
| 2003 | 3,040.18 | -23.03 % |
| 2004 | 3,563.77 | 17.22 % |
| 2005 | 3,433.70 | -3.65 % |
| 2006 | 3,681.72 | 7.22 % |
| 2007 | 3,892.26 | 5.72 % |
| 2008 | 3,877.93 | -0.37 % |
| 2009 | 4,207.52 | 8.50 % |
| 2010 | 3,776.52 | -10.24 % |
| 2011 | 3,227.57 | -14.54 % |
|
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