|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 47.00 | NA |
| 1987 | 49.08 | 4.42 % |
| 1988 | 50.69 | 3.29 % |
| 1989 | 50.01 | -1.34 % |
| 1990 | 50.76 | 1.50 % |
| 1991 | 50.48 | -0.55 % |
| 1992 | 45.80 | -9.28 % |
| 1993 | 44.05 | -3.81 % |
| 1994 | 43.89 | -0.37 % |
| 1995 | 44.98 | 2.49 % |
| 1996 | 50.01 | 11.19 % |
| 1997 | 48.61 | -2.81 % |
| 1998 | 50.25 | 3.37 % |
| 1999 | 52.70 | 4.88 % |
| 2000 | 54.28 | 3.00 % |
| 2001 | 56.18 | 3.50 % |
| 2002 | 51.34 | -8.61 % |
| 2003 | 57.86 | 12.70 % |
| 2004 | 63.04 | 8.95 % |
| 2005 | 68.99 | 9.43 % |
| 2006 | 76.79 | 11.31 % |
| 2007 | 79.86 | 3.99 % |
| 2008 | 102.13 | 27.89 % |
| 2009 | 113.95 | 11.58 % |
| 2010 | 120.45 | 5.70 % |
|
|