|
| 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 | 56.50 | NA |
| 1993 | 28.25 | -50.00 % |
| 1994 | 24.72 | -12.50 % |
| 1995 | 38.85 | 57.16 % |
| 1996 | 35.32 | -9.09 % |
| 1997 | 45.91 | 29.98 % |
| 1998 | 45.91 | 0.00 % |
| 1999 | 45.56 | -0.77 % |
| 2000 | 56.50 | 24.03 % |
| 2001 | 60.04 | 6.25 % |
| 2002 | 60.04 | 0.00 % |
| 2003 | 63.57 | 5.88 % |
| 2004 | 67.45 | 6.11 % |
| 2005 | 68.51 | 1.57 % |
| 2006 | 67.10 | -2.06 % |
| 2007 | 58.27 | -13.16 % |
| 2008 | 44.85 | -23.03 % |
| 2009 | 55.09 | 22.83 % |
| 2010 | 53.68 | -2.56 % |
| 2011 | 55.80 | 3.95 % |
|
|
