|
| year | consumption | change |
| 1980 | 17,056.00 | NA |
| 1981 | 16,058.00 | -5.85 % |
| 1982 | 15,296.00 | -4.75 % |
| 1983 | 15,231.00 | -0.42 % |
| 1984 | 15,725.61 | 3.25 % |
| 1985 | 15,726.42 | 0.01 % |
| 1986 | 16,280.63 | 3.52 % |
| 1987 | 16,665.04 | 2.36 % |
| 1988 | 17,283.31 | 3.71 % |
| 1989 | 17,325.15 | 0.24 % |
| 1990 | 16,988.50 | -1.94 % |
| 1991 | 16,713.84 | -1.62 % |
| 1992 | 17,032.86 | 1.91 % |
| 1993 | 17,236.73 | 1.20 % |
| 1994 | 17,718.16 | 2.79 % |
| 1995 | 17,724.59 | 0.04 % |
| 1996 | 18,308.90 | 3.30 % |
| 1997 | 18,620.30 | 1.70 % |
| 1998 | 18,917.14 | 1.59 % |
| 1999 | 19,519.34 | 3.18 % |
| 2000 | 19,701.08 | 0.93 % |
| 2001 | 19,648.71 | -0.27 % |
| 2002 | 19,761.30 | 0.57 % |
| 2003 | 20,033.51 | 1.38 % |
| 2004 | 20,731.15 | 3.48 % |
| 2005 | 20,802.16 | 0.34 % |
| 2006 | 20,687.42 | -0.55 % |
| 2007 | 20,680.38 | -0.03 % |
| 2008 | 19,497.97 | -5.72 % |
| 2009 | 18,771.40 | -3.73 % |
| 2010 | 19,180.13 | 2.18 % |
| 2011 | 18,949.43 | -1.20 % |
|
|