|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 97.85 | NA |
| 1987 | 110.82 | 13.25 % |
| 1988 | 123.03 | 11.03 % |
| 1989 | 146.92 | 19.41 % |
| 1990 | 169.04 | 15.06 % |
| 1991 | 171.75 | 1.61 % |
| 1992 | 178.03 | 3.66 % |
| 1993 | 207.21 | 16.39 % |
| 1994 | 228.69 | 10.36 % |
| 1995 | 269.00 | 17.63 % |
| 1996 | 306.12 | 13.80 % |
| 1997 | 302.30 | -1.25 % |
| 1998 | 263.78 | -12.74 % |
| 1999 | 263.84 | 0.02 % |
| 2000 | 262.70 | -0.43 % |
| 2001 | 267.93 | 1.99 % |
| 2002 | 277.21 | 3.46 % |
| 2003 | 302.80 | 9.23 % |
| 2004 | 337.73 | 11.53 % |
| 2005 | 341.99 | 1.26 % |
| 2006 | 324.36 | -5.16 % |
| 2007 | 328.85 | 1.39 % |
| 2008 | 300.42 | -8.65 % |
| 2009 | 318.53 | 6.03 % |
| 2010 | 318.90 | 0.12 % |
|
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