|
| year | consumption | change |
| 1980 | 106.00 | NA |
| 1981 | 116.00 | 9.43 % |
| 1982 | 118.00 | 1.72 % |
| 1983 | 123.00 | 4.24 % |
| 1984 | 120.00 | -2.44 % |
| 1985 | 120.59 | 0.49 % |
| 1986 | 117.87 | -2.25 % |
| 1987 | 114.94 | -2.49 % |
| 1988 | 119.98 | 4.39 % |
| 1989 | 124.72 | 3.95 % |
| 1990 | 85.00 | -31.85 % |
| 1991 | 94.80 | 11.53 % |
| 1992 | 119.83 | 26.41 % |
| 1993 | 130.59 | 8.98 % |
| 1994 | 166.44 | 27.45 % |
| 1995 | 173.42 | 4.19 % |
| 1996 | 189.17 | 9.09 % |
| 1997 | 211.92 | 12.02 % |
| 1998 | 237.83 | 12.23 % |
| 1999 | 258.88 | 8.85 % |
| 2000 | 264.42 | 2.14 % |
| 2001 | 275.18 | 4.07 % |
| 2002 | 285.16 | 3.62 % |
| 2003 | 297.83 | 4.44 % |
| 2004 | 305.32 | 2.52 % |
| 2005 | 329.94 | 8.06 % |
| 2006 | 317.06 | -3.90 % |
| 2007 | 321.61 | 1.43 % |
| 2008 | 325.32 | 1.15 % |
| 2009 | 372.14 | 14.39 % |
| 2010 | 383.38 | 3.02 % |
| 2011 | 339.00 | -11.58 % |
|
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