|
| 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 | 2,829.00 | NA |
| 1992 | 2,841.00 | 0.42 % |
| 1993 | 2,908.00 | 2.36 % |
| 1994 | 2,883.00 | -0.86 % |
| 1995 | 2,882.00 | -0.03 % |
| 1996 | 2,922.00 | 1.39 % |
| 1997 | 2,917.00 | -0.17 % |
| 1998 | 2,923.00 | 0.21 % |
| 1999 | 2,836.00 | -2.98 % |
| 2000 | 2,766.75 | -2.44 % |
| 2001 | 2,807.46 | 1.47 % |
| 2002 | 2,710.40 | -3.46 % |
| 2003 | 2,662.37 | -1.77 % |
| 2004 | 2,649.40 | -0.49 % |
| 2005 | 2,620.67 | -1.08 % |
| 2006 | 2,638.92 | 0.70 % |
| 2007 | 2,416.41 | -8.43 % |
| 2008 | 2,545.24 | 5.33 % |
| 2009 | 2,452.76 | -3.63 % |
| 2010 | 2,469.63 | 0.69 % |
| 2011 | 2,400.14 | -2.81 % |
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