|
| year | consumption | change |
| 1980 | 94.96 | NA |
| 1981 | 52.92 | -44.27 % |
| 1982 | 54.91 | 3.77 % |
| 1983 | 56.31 | 2.55 % |
| 1984 | 120.56 | 114.09 % |
| 1985 | 96.46 | -19.99 % |
| 1986 | 63.93 | -33.72 % |
| 1987 | 95.90 | 50.00 % |
| 1988 | 98.11 | 2.30 % |
| 1989 | 89.29 | -8.99 % |
| 1990 | 14.33 | -83.95 % |
| 1991 | 76.06 | 430.77 % |
| 1992 | 112.44 | 47.83 % |
| 1993 | 66.14 | -41.18 % |
| 1994 | 133.38 | 101.67 % |
| 1995 | 136.69 | 2.48 % |
| 1996 | 139.99 | 2.42 % |
| 1997 | 148.81 | 6.30 % |
| 1998 | 368.17 | 147.41 % |
| 1999 | 461.87 | 25.45 % |
| 2000 | 473.99 | 2.63 % |
| 2001 | 542.34 | 14.42 % |
| 2002 | 251.33 | -53.66 % |
| 2003 | 320.77 | 27.63 % |
| 2004 | 283.29 | -11.68 % |
| 2005 | 455.25 | 60.70 % |
| 2006 | 285.50 | -37.29 % |
| 2007 | 361.56 | 26.64 % |
| 2008 | 340.61 | -5.79 % |
| 2009 | 354.94 | 4.21 % |
| 2010 | 371.48 | 4.66 % |
| 2011 | 371.48 | 0.00 % |
|
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