|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 29.29 | NA |
| 1987 | 30.66 | 4.67 % |
| 1988 | 29.37 | -4.20 % |
| 1989 | 33.07 | 12.59 % |
| 1990 | 34.54 | 4.44 % |
| 1991 | 35.57 | 2.98 % |
| 1992 | 32.36 | -9.02 % |
| 1993 | 29.38 | -9.20 % |
| 1994 | 39.56 | 34.64 % |
| 1995 | 31.26 | -20.99 % |
| 1996 | 43.81 | 40.17 % |
| 1997 | 45.97 | 4.93 % |
| 1998 | 47.31 | 2.91 % |
| 1999 | 55.56 | 17.43 % |
| 2000 | 59.02 | 6.22 % |
| 2001 | 58.44 | -0.97 % |
| 2002 | 67.11 | 14.83 % |
| 2003 | 63.66 | -5.13 % |
| 2004 | 61.88 | -2.80 % |
| 2005 | 63.99 | 3.40 % |
| 2006 | 75.36 | 17.76 % |
| 2007 | 81.42 | 8.05 % |
| 2008 | 87.76 | 7.79 % |
| 2009 | 79.94 | -8.91 % |
| 2010 | 83.95 | 5.02 % |
|
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