|
| year | consumption | change |
| 1980 | 30.86 | NA |
| 1981 | 50.71 | 64.29 % |
| 1982 | 52.91 | 4.35 % |
| 1983 | 76.06 | 43.75 % |
| 1984 | 105.82 | 39.13 % |
| 1985 | 113.54 | 7.29 % |
| 1986 | 125.66 | 10.68 % |
| 1987 | 101.41 | -19.30 % |
| 1988 | 103.62 | 2.17 % |
| 1989 | 108.03 | 4.26 % |
| 1990 | 104.72 | -3.06 % |
| 1991 | 106.92 | 2.11 % |
| 1992 | 74.96 | -29.90 % |
| 1993 | 74.96 | 0.00 % |
| 1994 | 112.44 | 50.00 % |
| 1995 | 91.49 | -18.63 % |
| 1996 | 106.92 | 16.87 % |
| 1997 | 93.70 | -12.37 % |
| 1998 | 110.23 | 17.65 % |
| 1999 | 95.90 | -13.00 % |
| 2000 | 163.14 | 70.11 % |
| 2001 | 154.32 | -5.41 % |
| 2002 | 160.94 | 4.29 % |
| 2003 | 152.12 | -5.48 % |
| 2004 | 171.96 | 13.04 % |
| 2005 | 165.35 | -3.85 % |
| 2006 | 147.71 | -10.67 % |
| 2007 | 177.47 | 20.15 % |
| 2008 | 155.43 | -12.42 % |
| 2009 | 142.20 | -8.51 % |
| 2010 | 149.91 | 5.43 % |
| 2011 | 146.61 | -2.21 % |
|
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