|
| year | consumption | change |
| 1984 | 48.08 | NA |
| 1985 | 52.47 | 9.12 % |
| 1986 | 56.25 | 7.21 % |
| 1987 | 58.19 | 3.44 % |
| 1988 | 61.51 | 5.72 % |
| 1989 | 64.57 | 4.96 % |
| 1990 | 68.28 | 5.76 % |
| 1991 | 78.75 | 15.33 % |
| 1992 | 78.86 | 0.14 % |
| 1993 | 86.11 | 9.18 % |
| 1994 | 86.82 | 0.83 % |
| 1995 | 92.88 | 6.97 % |
| 1996 | 112.90 | 21.56 % |
| 1997 | 108.35 | -4.03 % |
| 1998 | 119.28 | 10.09 % |
| 1999 | 117.58 | -1.43 % |
| 2000 | 120.71 | 2.66 % |
| 2001 | 133.42 | 10.53 % |
| 2002 | 142.31 | 6.66 % |
| 2003 | 155.15 | 9.02 % |
| 2004 | 157.53 | 1.54 % |
| 2005 | 167.49 | 6.32 % |
| 2006 | 160.20 | -4.36 % |
| 2007 | 158.68 | -0.95 % |
| 2008 | 158.19 | -0.31 % |
| 2009 | 152.12 | -3.83 % |
| 2010 | 156.70 | 3.01 % |
|
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