|
| year | consumption | change |
| 1980 | 133,560.50 | NA |
| 1981 | 130,343.90 | -2.41 % |
| 1982 | 122,355.50 | -6.13 % |
| 1983 | 123,315.60 | 0.78 % |
| 1984 | 87,553.28 | -29.00 % |
| 1985 | 116,295.00 | 32.83 % |
| 1986 | 122,972.80 | 5.74 % |
| 1987 | 128,541.60 | 4.53 % |
| 1988 | 122,836.10 | -4.44 % |
| 1989 | 125,929.10 | 2.52 % |
| 1990 | 119,377.00 | -5.20 % |
| 1991 | 118,033.60 | -1.13 % |
| 1992 | 110,743.70 | -6.18 % |
| 1993 | 96,144.70 | -13.18 % |
| 1994 | 90,779.74 | -5.58 % |
| 1995 | 78,971.50 | -13.01 % |
| 1996 | 76,928.10 | -2.59 % |
| 1997 | 68,894.46 | -10.44 % |
| 1998 | 68,409.45 | -0.70 % |
| 1999 | 60,659.09 | -11.33 % |
| 2000 | 65,627.21 | 8.19 % |
| 2001 | 69,529.39 | 5.95 % |
| 2002 | 64,327.59 | -7.48 % |
| 2003 | 69,491.91 | 8.03 % |
| 2004 | 67,307.13 | -3.14 % |
| 2005 | 68,261.73 | 1.42 % |
| 2006 | 74,440.19 | 9.05 % |
| 2007 | 69,668.28 | -6.41 % |
| 2008 | 64,501.75 | -7.42 % |
| 2009 | 53,273.61 | -17.41 % |
| 2010 | 55,392.25 | 3.98 % |
| 2011 | 54,890.70 | -0.91 % |
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