|
| year | consumption | change |
| 1984 | 14.73 | NA |
| 1985 | 18.98 | 28.82 % |
| 1986 | 23.44 | 23.52 % |
| 1987 | 28.38 | 21.05 % |
| 1988 | 37.10 | 30.76 % |
| 1989 | 50.13 | 35.10 % |
| 1990 | 64.92 | 29.50 % |
| 1991 | 78.66 | 21.17 % |
| 1992 | 96.30 | 22.43 % |
| 1993 | 116.45 | 20.92 % |
| 1994 | 141.53 | 21.54 % |
| 1995 | 163.89 | 15.80 % |
| 1996 | 187.31 | 14.29 % |
| 1997 | 197.05 | 5.20 % |
| 1998 | 168.40 | -14.54 % |
| 1999 | 176.39 | 4.74 % |
| 2000 | 170.46 | -3.36 % |
| 2001 | 171.81 | 0.79 % |
| 2002 | 175.58 | 2.19 % |
| 2003 | 165.78 | -5.58 % |
| 2004 | 159.30 | -3.91 % |
| 2005 | 162.88 | 2.25 % |
| 2006 | 163.90 | 0.62 % |
| 2007 | 171.21 | 4.46 % |
| 2008 | 171.95 | 0.43 % |
| 2009 | 180.16 | 4.77 % |
| 2010 | 189.23 | 5.04 % |
|
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