|
| year | consumption | change |
| 1980 | 645.56 | NA |
| 1981 | 792.08 | 22.70 % |
| 1982 | 643.53 | -18.75 % |
| 1983 | 704.20 | 9.43 % |
| 1984 | 1,222.45 | 73.59 % |
| 1985 | 1,757.04 | 43.73 % |
| 1986 | 3,957.92 | 125.26 % |
| 1987 | 4,260.20 | 7.64 % |
| 1988 | 4,876.48 | 14.47 % |
| 1989 | 6,571.47 | 34.76 % |
| 1990 | 7,198.98 | 9.55 % |
| 1991 | 6,489.64 | -9.85 % |
| 1992 | 7,511.26 | 15.74 % |
| 1993 | 11,577.58 | 54.14 % |
| 1994 | 13,801.80 | 19.21 % |
| 1995 | 11,590.33 | -16.02 % |
| 1996 | 16,149.91 | 39.34 % |
| 1997 | 14,865.89 | -7.95 % |
| 1998 | 17,712.36 | 19.15 % |
| 1999 | 21,573.34 | 21.80 % |
| 2000 | 22,437.55 | 4.01 % |
| 2001 | 31,299.03 | 39.49 % |
| 2002 | 30,874.64 | -1.36 % |
| 2003 | 30,125.07 | -2.43 % |
| 2004 | 42,717.87 | 41.80 % |
| 2005 | 45,436.17 | 6.36 % |
| 2006 | 54,554.49 | 20.07 % |
| 2007 | 60,170.77 | 10.29 % |
| 2008 | 55,205.96 | -8.25 % |
| 2009 | 63,807.29 | 15.58 % |
| 2010 | 63,773.12 | -0.05 % |
| 2011 | 73,720.38 | 15.60 % |
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