|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 93.84 | NA |
| 1987 | 100.20 | 6.77 % |
| 1988 | 107.38 | 7.17 % |
| 1989 | 113.88 | 6.05 % |
| 1990 | 117.70 | 3.36 % |
| 1991 | 123.07 | 4.56 % |
| 1992 | 127.62 | 3.70 % |
| 1993 | 144.55 | 13.27 % |
| 1994 | 119.15 | -17.57 % |
| 1995 | 125.44 | 5.28 % |
| 1996 | 126.32 | 0.70 % |
| 1997 | 158.51 | 25.48 % |
| 1998 | 175.49 | 10.71 % |
| 1999 | 164.68 | -6.16 % |
| 2000 | 215.34 | 30.76 % |
| 2001 | 233.45 | 8.41 % |
| 2002 | 241.34 | 3.38 % |
| 2003 | 225.07 | -6.74 % |
| 2004 | 215.19 | -4.39 % |
| 2005 | 238.68 | 10.92 % |
| 2006 | 275.50 | 15.43 % |
| 2007 | 307.24 | 11.52 % |
| 2008 | 333.43 | 8.52 % |
| 2009 | 324.33 | -2.73 % |
| 2010 | 351.40 | 8.35 % |
|
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