|
| year | consumption | change |
| 1984 | 2,056.66 | NA |
| 1985 | 2,058.04 | 0.07 % |
| 1986 | 2,291.28 | 11.33 % |
| 1987 | 2,352.34 | 2.66 % |
| 1988 | 2,435.36 | 3.53 % |
| 1989 | 2,492.10 | 2.33 % |
| 1990 | 2,557.97 | 2.64 % |
| 1991 | 3,200.82 | 25.13 % |
| 1992 | 4,270.18 | 33.41 % |
| 1993 | 4,147.94 | -2.86 % |
| 1994 | 4,046.22 | -2.45 % |
| 1995 | 4,065.56 | 0.48 % |
| 1996 | 4,006.25 | -1.46 % |
| 1997 | 4,003.85 | -0.06 % |
| 1998 | 4,043.21 | 0.98 % |
| 1999 | 4,019.39 | -0.59 % |
| 2000 | 3,860.78 | -3.95 % |
| 2001 | 3,907.82 | 1.22 % |
| 2002 | 3,861.25 | -1.19 % |
| 2003 | 3,731.16 | -3.37 % |
| 2004 | 3,644.71 | -2.32 % |
| 2005 | 3,557.50 | -2.39 % |
| 2006 | 3,526.58 | -0.87 % |
| 2007 | 3,462.55 | -1.82 % |
| 2008 | 3,405.50 | -1.65 % |
| 2009 | 3,324.93 | -2.37 % |
| 2010 | 3,260.41 | -1.94 % |
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