|
| year | consumption | change |
| 1980 | 160.00 | NA |
| 1981 | 163.00 | 1.88 % |
| 1982 | 162.00 | -0.61 % |
| 1983 | 151.00 | -6.79 % |
| 1984 | 126.00 | -16.56 % |
| 1985 | 132.00 | 4.76 % |
| 1986 | 143.00 | 8.33 % |
| 1987 | 158.00 | 10.49 % |
| 1988 | 168.00 | 6.33 % |
| 1989 | 173.00 | 2.98 % |
| 1990 | 179.00 | 3.47 % |
| 1991 | 180.00 | 0.56 % |
| 1992 | 181.00 | 0.56 % |
| 1993 | 199.00 | 9.94 % |
| 1994 | 212.00 | 6.53 % |
| 1995 | 228.00 | 7.55 % |
| 1996 | 221.00 | -3.07 % |
| 1997 | 230.00 | 4.07 % |
| 1998 | 228.00 | -0.87 % |
| 1999 | 235.00 | 3.07 % |
| 2000 | 252.41 | 7.41 % |
| 2001 | 233.68 | -7.42 % |
| 2002 | 246.86 | 5.64 % |
| 2003 | 254.58 | 3.13 % |
| 2004 | 248.28 | -2.48 % |
| 2005 | 233.44 | -5.98 % |
| 2006 | 242.15 | 3.73 % |
| 2007 | 250.75 | 3.55 % |
| 2008 | 246.04 | -1.88 % |
| 2009 | 232.75 | -5.40 % |
| 2010 | 250.08 | 7.45 % |
| 2011 | 263.01 | 5.17 % |
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