|
| year | consumption | change |
| 1980 | 200.00 | NA |
| 1981 | 185.00 | -7.50 % |
| 1982 | 167.00 | -9.73 % |
| 1983 | 165.00 | -1.20 % |
| 1984 | 188.00 | 13.94 % |
| 1985 | 197.00 | 4.79 % |
| 1986 | 201.00 | 2.03 % |
| 1987 | 204.00 | 1.49 % |
| 1988 | 196.00 | -3.92 % |
| 1989 | 190.00 | -3.06 % |
| 1990 | 199.00 | 4.74 % |
| 1991 | 189.00 | -5.03 % |
| 1992 | 189.00 | 0.00 % |
| 1993 | 195.00 | 3.17 % |
| 1994 | 200.00 | 2.56 % |
| 1995 | 208.00 | 4.00 % |
| 1996 | 220.00 | 5.77 % |
| 1997 | 220.00 | 0.00 % |
| 1998 | 221.00 | 0.45 % |
| 1999 | 222.00 | 0.45 % |
| 2000 | 211.40 | -4.78 % |
| 2001 | 219.60 | 3.88 % |
| 2002 | 218.60 | -0.46 % |
| 2003 | 229.27 | 4.88 % |
| 2004 | 215.52 | -6.00 % |
| 2005 | 216.71 | 0.55 % |
| 2006 | 236.70 | 9.23 % |
| 2007 | 231.71 | -2.11 % |
| 2008 | 223.35 | -3.61 % |
| 2009 | 224.85 | 0.67 % |
| 2010 | 220.77 | -1.82 % |
| 2011 | 255.17 | 15.58 % |
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