|
| year | consumption | change |
| 1984 | 266.93 | NA |
| 1985 | 272.71 | 2.16 % |
| 1986 | 275.63 | 1.07 % |
| 1987 | 278.06 | 0.88 % |
| 1988 | 286.89 | 3.18 % |
| 1989 | 297.98 | 3.87 % |
| 1990 | 297.89 | -0.03 % |
| 1991 | 289.61 | -2.78 % |
| 1992 | 291.21 | 0.55 % |
| 1993 | 296.15 | 1.69 % |
| 1994 | 301.60 | 1.84 % |
| 1995 | 302.86 | 0.42 % |
| 1996 | 305.81 | 0.98 % |
| 1997 | 305.54 | -0.09 % |
| 1998 | 308.41 | 0.94 % |
| 1999 | 315.31 | 2.24 % |
| 2000 | 307.98 | -2.33 % |
| 2001 | 313.25 | 1.71 % |
| 2002 | 325.12 | 3.79 % |
| 2003 | 332.30 | 2.21 % |
| 2004 | 335.44 | 0.95 % |
| 2005 | 332.43 | -0.90 % |
| 2006 | 326.12 | -1.90 % |
| 2007 | 331.26 | 1.58 % |
| 2008 | 323.04 | -2.48 % |
| 2009 | 322.76 | -0.09 % |
| 2010 | 322.58 | -0.06 % |
|
|