|
| year | consumption | change |
| 1980 | 1,002,692.00 | NA |
| 1981 | 1,037,670.00 | 3.49 % |
| 1982 | 1,097,722.00 | 5.79 % |
| 1983 | 1,154,110.00 | 5.14 % |
| 1984 | 1,285,737.00 | 11.41 % |
| 1985 | 1,326,635.00 | 3.18 % |
| 1986 | 1,389,522.00 | 4.74 % |
| 1987 | 1,461,453.00 | 5.18 % |
| 1988 | 1,576,096.00 | 7.84 % |
| 1989 | 1,593,991.00 | 1.14 % |
| 1990 | 1,618,150.00 | 1.52 % |
| 1991 | 1,691,564.00 | 4.54 % |
| 1992 | 1,844,409.00 | 9.04 % |
| 1993 | 1,902,155.00 | 3.13 % |
| 1994 | 2,021,301.00 | 6.26 % |
| 1995 | 2,130,295.00 | 5.39 % |
| 1996 | 2,191,432.00 | 2.87 % |
| 1997 | 2,221,474.00 | 1.37 % |
| 1998 | 2,271,491.00 | 2.25 % |
| 1999 | 2,236,606.00 | -1.54 % |
| 2000 | 2,336,447.00 | 4.46 % |
| 2001 | 2,422,783.00 | 3.70 % |
| 2002 | 2,532,530.00 | 4.53 % |
| 2003 | 2,794,894.00 | 10.36 % |
| 2004 | 3,086,649.00 | 10.44 % |
| 2005 | 3,467,576.00 | 12.34 % |
| 2006 | 3,746,318.00 | 8.04 % |
| 2007 | 4,004,728.00 | 6.90 % |
| 2008 | 4,245,275.00 | 6.01 % |
| 2009 | 4,645,837.00 | 9.44 % |
| 2010 | 4,847,886.00 | 4.35 % |
| 2011 | 5,244,301.00 | 8.18 % |
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