|
| year | consumption | change |
| 1980 | 122,928.70 | NA |
| 1981 | 144,012.60 | 17.15 % |
| 1982 | 150,294.60 | 4.36 % |
| 1983 | 157,906.10 | 5.06 % |
| 1984 | 186,706.20 | 18.24 % |
| 1985 | 194,065.20 | 3.94 % |
| 1986 | 208,829.60 | 7.61 % |
| 1987 | 210,933.90 | 1.01 % |
| 1988 | 221,892.00 | 5.20 % |
| 1989 | 236,378.50 | 6.53 % |
| 1990 | 247,863.50 | 4.86 % |
| 1991 | 269,813.80 | 8.86 % |
| 1992 | 281,854.40 | 4.46 % |
| 1993 | 295,959.60 | 5.00 % |
| 1994 | 312,526.20 | 5.60 % |
| 1995 | 329,291.30 | 5.36 % |
| 1996 | 318,616.50 | -3.24 % |
| 1997 | 343,008.40 | 7.66 % |
| 1998 | 354,649.90 | 3.39 % |
| 1999 | 381,413.00 | 7.55 % |
| 2000 | 396,193.80 | 3.88 % |
| 2001 | 411,844.50 | 3.95 % |
| 2002 | 419,532.00 | 1.87 % |
| 2003 | 432,047.60 | 2.98 % |
| 2004 | 481,400.30 | 11.42 % |
| 2005 | 504,908.20 | 4.88 % |
| 2006 | 539,485.50 | 6.85 % |
| 2007 | 587,255.30 | 8.85 % |
| 2008 | 640,524.50 | 9.07 % |
| 2009 | 674,878.00 | 5.36 % |
| 2010 | 662,585.00 | -1.82 % |
| 2011 | 721,418.70 | 8.88 % |
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