|
| year | consumption | change |
| 1984 | 133.93 | NA |
| 1985 | 136.45 | 1.88 % |
| 1986 | 147.98 | 8.45 % |
| 1987 | 158.38 | 7.03 % |
| 1988 | 175.56 | 10.85 % |
| 1989 | 179.72 | 2.37 % |
| 1990 | 188.56 | 4.92 % |
| 1991 | 197.57 | 4.78 % |
| 1992 | 212.26 | 7.44 % |
| 1993 | 204.91 | -3.46 % |
| 1994 | 212.07 | 3.49 % |
| 1995 | 197.57 | -6.84 % |
| 1996 | 209.93 | 6.26 % |
| 1997 | 207.66 | -1.08 % |
| 1998 | 208.52 | 0.41 % |
| 1999 | 206.69 | -0.88 % |
| 2000 | 196.80 | -4.78 % |
| 2001 | 196.34 | -0.23 % |
| 2002 | 189.98 | -3.24 % |
| 2003 | 186.13 | -2.02 % |
| 2004 | 176.62 | -5.11 % |
| 2005 | 172.18 | -2.52 % |
| 2006 | 164.53 | -4.44 % |
| 2007 | 158.48 | -3.68 % |
| 2008 | 145.15 | -8.41 % |
| 2009 | 138.95 | -4.27 % |
| 2010 | 131.28 | -5.52 % |
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