|
| year | consumption | change |
| 1980 | 185.62 | NA |
| 1981 | 159.20 | -14.23 % |
| 1982 | 154.08 | -3.22 % |
| 1983 | 157.19 | 2.02 % |
| 1984 | 175.20 | 11.46 % |
| 1985 | 188.00 | 7.31 % |
| 1986 | 182.00 | -3.19 % |
| 1987 | 190.14 | 4.47 % |
| 1988 | 181.10 | -4.75 % |
| 1989 | 195.00 | 7.68 % |
| 1990 | 215.00 | 10.26 % |
| 1991 | 228.00 | 6.05 % |
| 1992 | 223.90 | -1.80 % |
| 1993 | 235.48 | 5.17 % |
| 1994 | 242.37 | 2.93 % |
| 1995 | 262.04 | 8.12 % |
| 1996 | 281.50 | 7.42 % |
| 1997 | 271.29 | -3.63 % |
| 1998 | 278.53 | 2.67 % |
| 1999 | 284.57 | 2.17 % |
| 2000 | 271.78 | -4.49 % |
| 2001 | 287.82 | 5.90 % |
| 2002 | 291.07 | 1.13 % |
| 2003 | 314.73 | 8.13 % |
| 2004 | 310.98 | -1.19 % |
| 2005 | 335.88 | 8.01 % |
| 2006 | 306.32 | -8.80 % |
| 2007 | 313.10 | 2.21 % |
| 2008 | 330.83 | 5.66 % |
| 2009 | 322.89 | -2.40 % |
| 2010 | 353.40 | 9.45 % |
| 2011 | 334.61 | -5.32 % |
|
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