|
| year | consumption | change |
| 1980 | 40.00 | NA |
| 1981 | 49.00 | 22.50 % |
| 1982 | 46.00 | -6.12 % |
| 1983 | 46.00 | 0.00 % |
| 1984 | 46.00 | 0.00 % |
| 1985 | 47.00 | 2.17 % |
| 1986 | 49.00 | 4.26 % |
| 1987 | 47.32 | -3.43 % |
| 1988 | 44.14 | -6.72 % |
| 1989 | 40.62 | -7.97 % |
| 1990 | 19.00 | -53.23 % |
| 1991 | 18.36 | -3.35 % |
| 1992 | 17.87 | -2.68 % |
| 1993 | 33.90 | 89.68 % |
| 1994 | 34.61 | 2.09 % |
| 1995 | 32.84 | -5.11 % |
| 1996 | 34.26 | 4.31 % |
| 1997 | 8.48 | -75.26 % |
| 1998 | 14.48 | 70.83 % |
| 1999 | 14.48 | 0.00 % |
| 2000 | 12.01 | -17.07 % |
| 2001 | 13.07 | 8.82 % |
| 2002 | 15.54 | 18.92 % |
| 2003 | 18.36 | 18.18 % |
| 2004 | 30.37 | 65.38 % |
| 2005 | 55.80 | 83.72 % |
| 2006 | 62.86 | 12.66 % |
| 2007 | 94.29 | 50.00 % |
| 2008 | 128.90 | 36.70 % |
| 2009 | 122.54 | -4.93 % |
| 2010 | 193.88 | 58.21 % |
| 2011 | 201.65 | 4.01 % |
|
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