|
| year | consumption | change |
| 1980 | 387.00 | NA |
| 1981 | 346.00 | -10.59 % |
| 1982 | 318.00 | -8.09 % |
| 1983 | 325.00 | 2.20 % |
| 1984 | 314.00 | -3.38 % |
| 1985 | 317.00 | 0.96 % |
| 1986 | 331.00 | 4.42 % |
| 1987 | 340.00 | 2.72 % |
| 1988 | 340.00 | 0.00 % |
| 1989 | 345.00 | 1.47 % |
| 1990 | 280.00 | -18.84 % |
| 1991 | 271.00 | -3.21 % |
| 1992 | 279.00 | 2.95 % |
| 1993 | 293.00 | 5.02 % |
| 1994 | 304.00 | 3.75 % |
| 1995 | 318.00 | 4.61 % |
| 1996 | 361.00 | 13.52 % |
| 1997 | 391.00 | 8.31 % |
| 1998 | 404.00 | 3.32 % |
| 1999 | 420.00 | 3.96 % |
| 2000 | 411.26 | -2.08 % |
| 2001 | 404.69 | -1.60 % |
| 2002 | 406.43 | 0.43 % |
| 2003 | 430.67 | 5.96 % |
| 2004 | 454.14 | 5.45 % |
| 2005 | 470.41 | 3.58 % |
| 2006 | 500.29 | 6.35 % |
| 2007 | 520.64 | 4.07 % |
| 2008 | 534.08 | 2.58 % |
| 2009 | 537.67 | 0.67 % |
| 2010 | 560.00 | 4.15 % |
| 2011 | 578.69 | 3.34 % |
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