|
| year | consumption | change |
| 1980 | .00 | NA |
| 1981 | .00 | -0.42 % |
| 1982 | .00 | 12.34 % |
| 1983 | .00 | -3.03 % |
| 1984 | .00 | 3.52 % |
| 1985 | .00 | 1.89 % |
| 1986 | .00 | 0.37 % |
| 1987 | .00 | 2.95 % |
| 1988 | .00 | 1.43 % |
| 1989 | .00 | 0.00 % |
| 1990 | .00 | 4.59 % |
| 1991 | .00 | 0.00 % |
| 1992 | .00 | 1.35 % |
| 1993 | .00 | -6.33 % |
| 1994 | .00 | 3.91 % |
| 1995 | .00 | 7.19 % |
| 1996 | .00 | 0.00 % |
| 1997 | .00 | 0.00 % |
| 1998 | .00 | 0.00 % |
| 1999 | .00 | 0.00 % |
| 2000 | .00 | 15.02 % |
| 2001 | .00 | 1.67 % |
| 2002 | .00 | 0.00 % |
| 2003 | .00 | 0.00 % |
| 2004 | .00 | -0.55 % |
| 2005 | .00 | 13.19 % |
| 2006 | .00 | -11.41 % |
| 2007 | .00 | 4.93 % |
| 2008 | .00 | -4.96 % |
| 2009 | .00 | 0.27 % |
| 2010 | .00 | 0.00 % |
|
|