|
| year | consumption | change |
| 1980 | 232.00 | NA |
| 1981 | 225.00 | -3.02 % |
| 1982 | 209.00 | -7.11 % |
| 1983 | 206.75 | -1.08 % |
| 1984 | 202.00 | -2.30 % |
| 1985 | 198.00 | -1.98 % |
| 1986 | 206.00 | 4.04 % |
| 1987 | 209.00 | 1.46 % |
| 1988 | 205.00 | -1.91 % |
| 1989 | 205.00 | 0.00 % |
| 1990 | 217.00 | 5.85 % |
| 1991 | 234.00 | 7.83 % |
| 1992 | 229.00 | -2.14 % |
| 1993 | 235.00 | 2.62 % |
| 1994 | 233.00 | -0.85 % |
| 1995 | 233.00 | 0.00 % |
| 1996 | 254.00 | 9.01 % |
| 1997 | 254.00 | 0.00 % |
| 1998 | 266.00 | 4.72 % |
| 1999 | 253.00 | -4.89 % |
| 2000 | 250.60 | -0.95 % |
| 2001 | 267.04 | 6.56 % |
| 2002 | 273.62 | 2.46 % |
| 2003 | 288.81 | 5.55 % |
| 2004 | 295.37 | 2.27 % |
| 2005 | 299.25 | 1.31 % |
| 2006 | 298.82 | -0.15 % |
| 2007 | 292.97 | -1.96 % |
| 2008 | 282.80 | -3.47 % |
| 2009 | 269.10 | -4.84 % |
| 2010 | 277.14 | 2.99 % |
| 2011 | 262.90 | -5.14 % |
|
|