|
| year | consumption | change |
| 1980 | .37 | NA |
| 1981 | .38 | 2.70 % |
| 1982 | .49 | 28.95 % |
| 1983 | .41 | -16.33 % |
| 1984 | .42 | 2.44 % |
| 1985 | .43 | 2.38 % |
| 1986 | .44 | 2.33 % |
| 1987 | .45 | 2.27 % |
| 1988 | .69 | 53.33 % |
| 1989 | .77 | 11.59 % |
| 1990 | .57 | -25.97 % |
| 1991 | .64 | 12.28 % |
| 1992 | .64 | 0.00 % |
| 1993 | .64 | 0.00 % |
| 1994 | .64 | 0.00 % |
| 1995 | .66 | 3.13 % |
| 1996 | .95 | 43.94 % |
| 1997 | .96 | 1.05 % |
| 1998 | 1.05 | 9.37 % |
| 1999 | 1.03 | -1.90 % |
| 2000 | 1.07 | 3.88 % |
| 2001 | 1.50 | 40.19 % |
| 2002 | 1.83 | 22.00 % |
| 2003 | 2.06 | 12.57 % |
| 2004 | 2.40 | 16.50 % |
| 2005 | 2.63 | 9.58 % |
| 2006 | 3.57 | 35.74 % |
|
|
