|
| year | consumption | change |
| 1980 | 321.79 | NA |
| 1981 | 367.77 | 14.29 % |
| 1982 | 407.43 | 10.78 % |
| 1983 | 412.73 | 1.30 % |
| 1984 | 440.31 | 6.68 % |
| 1985 | 462.60 | 5.06 % |
| 1986 | 516.00 | 11.54 % |
| 1987 | 532.00 | 3.10 % |
| 1988 | 555.00 | 4.32 % |
| 1989 | 570.00 | 2.70 % |
| 1990 | 625.00 | 9.65 % |
| 1991 | 584.00 | -6.56 % |
| 1992 | 603.71 | 3.37 % |
| 1993 | 630.16 | 4.38 % |
| 1994 | 661.31 | 4.94 % |
| 1995 | 709.69 | 7.32 % |
| 1996 | 719.19 | 1.34 % |
| 1997 | 717.99 | -0.17 % |
| 1998 | 751.64 | 4.69 % |
| 1999 | 759.10 | 0.99 % |
| 2000 | 796.95 | 4.99 % |
| 2001 | 841.10 | 5.54 % |
| 2002 | 887.68 | 5.54 % |
| 2003 | 916.85 | 3.29 % |
| 2004 | 984.97 | 7.43 % |
| 2005 | 1,008.56 | 2.40 % |
| 2006 | 1,031.06 | 2.23 % |
| 2007 | 1,030.95 | -0.01 % |
| 2008 | 1,028.06 | -0.28 % |
| 2009 | 1,100.03 | 7.00 % |
| 2010 | 1,179.27 | 7.20 % |
| 2011 | 1,239.24 | 5.08 % |
|
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