|
| year | consumption | change |
| 1984 | 36.82 | NA |
| 1985 | 40.37 | 9.66 % |
| 1986 | 43.61 | 8.03 % |
| 1987 | 43.91 | 0.67 % |
| 1988 | 42.89 | -2.31 % |
| 1989 | 41.82 | -2.50 % |
| 1990 | 44.43 | 6.24 % |
| 1991 | 51.45 | 15.81 % |
| 1992 | 53.22 | 3.44 % |
| 1993 | 56.67 | 6.48 % |
| 1994 | 57.32 | 1.16 % |
| 1995 | 59.88 | 4.47 % |
| 1996 | 71.83 | 19.94 % |
| 1997 | 72.18 | 0.49 % |
| 1998 | 77.16 | 6.90 % |
| 1999 | 78.43 | 1.65 % |
| 2000 | 82.64 | 5.36 % |
| 2001 | 91.64 | 10.90 % |
| 2002 | 77.24 | -15.71 % |
| 2003 | 77.05 | -0.25 % |
| 2004 | 85.02 | 10.34 % |
| 2005 | 83.55 | -1.73 % |
| 2006 | 86.72 | 3.80 % |
| 2007 | 78.39 | -9.61 % |
| 2008 | 79.51 | 1.42 % |
| 2009 | 80.55 | 1.31 % |
| 2010 | 87.45 | 8.57 % |
|
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