|
| year | consumption | change |
| 1980 | 678,511.30 | NA |
| 1981 | 679,906.80 | 0.21 % |
| 1982 | 725,981.20 | 6.78 % |
| 1983 | 768,223.90 | 5.82 % |
| 1984 | 844,845.60 | 9.97 % |
| 1985 | 856,096.90 | 1.33 % |
| 1986 | 907,163.70 | 5.97 % |
| 1987 | 971,986.20 | 7.15 % |
| 1988 | 1,042,611.00 | 7.27 % |
| 1989 | 1,058,302.00 | 1.50 % |
| 1990 | 1,069,014.00 | 1.01 % |
| 1991 | 1,117,333.00 | 4.52 % |
| 1992 | 1,155,388.00 | 3.41 % |
| 1993 | 1,205,472.00 | 4.33 % |
| 1994 | 1,303,034.00 | 8.09 % |
| 1995 | 1,401,074.00 | 7.52 % |
| 1996 | 1,469,161.00 | 4.86 % |
| 1997 | 1,469,977.00 | 0.06 % |
| 1998 | 1,509,366.00 | 2.68 % |
| 1999 | 1,437,497.00 | -4.76 % |
| 2000 | 1,481,867.00 | 3.09 % |
| 2001 | 1,523,839.00 | 2.83 % |
| 2002 | 1,608,370.00 | 5.55 % |
| 2003 | 1,834,611.00 | 14.07 % |
| 2004 | 2,033,364.00 | 10.83 % |
| 2005 | 2,384,804.00 | 17.28 % |
| 2006 | 2,608,471.00 | 9.38 % |
| 2007 | 2,788,086.00 | 6.89 % |
| 2008 | 2,953,217.00 | 5.92 % |
| 2009 | 3,350,859.00 | 13.46 % |
| 2010 | 3,501,780.00 | 4.50 % |
| 2011 | 3,826,869.00 | 9.28 % |
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