|
| year | consumption | change |
| 1980 | 290.00 | NA |
| 1981 | 243.00 | -16.21 % |
| 1982 | 230.00 | -5.35 % |
| 1983 | 219.00 | -4.78 % |
| 1984 | 217.00 | -0.91 % |
| 1985 | 226.00 | 4.15 % |
| 1986 | 222.00 | -1.77 % |
| 1987 | 214.00 | -3.60 % |
| 1988 | 204.00 | -4.67 % |
| 1989 | 196.00 | -3.92 % |
| 1990 | 192.00 | -2.04 % |
| 1991 | 194.00 | 1.04 % |
| 1992 | 192.00 | -1.03 % |
| 1993 | 199.00 | 3.65 % |
| 1994 | 211.00 | 6.03 % |
| 1995 | 223.00 | 5.69 % |
| 1996 | 235.00 | 5.38 % |
| 1997 | 227.00 | -3.40 % |
| 1998 | 223.00 | -1.76 % |
| 1999 | 220.00 | -1.35 % |
| 2000 | 210.00 | -4.55 % |
| 2001 | 213.41 | 1.62 % |
| 2002 | 197.16 | -7.61 % |
| 2003 | 188.27 | -4.51 % |
| 2004 | 185.33 | -1.56 % |
| 2005 | 183.46 | -1.01 % |
| 2006 | 190.45 | 3.81 % |
| 2007 | 190.61 | 0.09 % |
| 2008 | 181.05 | -5.01 % |
| 2009 | 166.51 | -8.03 % |
| 2010 | 167.47 | 0.57 % |
| 2011 | 160.20 | -4.34 % |
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