|
| year | consumption | change |
| 1984 | 29.22 | NA |
| 1985 | 29.65 | 1.50 % |
| 1986 | 32.55 | 9.76 % |
| 1987 | 37.53 | 15.32 % |
| 1988 | 41.99 | 11.88 % |
| 1989 | 46.30 | 10.27 % |
| 1990 | 50.85 | 9.82 % |
| 1991 | 54.34 | 6.86 % |
| 1992 | 58.92 | 8.43 % |
| 1993 | 66.77 | 13.32 % |
| 1994 | 65.53 | -1.85 % |
| 1995 | 75.07 | 14.55 % |
| 1996 | 79.81 | 6.32 % |
| 1997 | 90.89 | 13.89 % |
| 1998 | 101.41 | 11.58 % |
| 1999 | 106.69 | 5.20 % |
| 2000 | 143.35 | 34.36 % |
| 2001 | 121.18 | -15.47 % |
| 2002 | 113.62 | -6.24 % |
| 2003 | 112.35 | -1.12 % |
| 2004 | 124.25 | 10.59 % |
| 2005 | 132.11 | 6.33 % |
| 2006 | 110.92 | -16.04 % |
| 2007 | 108.69 | -2.00 % |
| 2008 | 107.16 | -1.41 % |
| 2009 | 115.49 | 7.77 % |
| 2010 | 100.30 | -13.15 % |
|
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