|
| year | consumption | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | | NA |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | | NA |
| 1987 | | NA |
| 1988 | | NA |
| 1989 | | NA |
| 1990 | | NA |
| 1991 | | NA |
| 1992 | 190.42 | NA |
| 1993 | 178.55 | -6.23 % |
| 1994 | 172.83 | -3.20 % |
| 1995 | 184.74 | 6.89 % |
| 1996 | 144.06 | -22.02 % |
| 1997 | 139.87 | -2.91 % |
| 1998 | 147.02 | 5.11 % |
| 1999 | 150.14 | 2.12 % |
| 2000 | 146.09 | -2.69 % |
| 2001 | 148.26 | 1.48 % |
| 2002 | 151.36 | 2.10 % |
| 2003 | 150.47 | -0.59 % |
| 2004 | 152.11 | 1.09 % |
| 2005 | 145.26 | -4.50 % |
| 2006 | 137.21 | -5.55 % |
| 2007 | 141.63 | 3.23 % |
| 2008 | 85.74 | -39.47 % |
| 2009 | 94.03 | 9.68 % |
| 2010 | 96.45 | 2.57 % |
| 2011 | 147.00 | 52.41 % |
|
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