|
| year | consumption | change |
| 1984 | | NA |
| 1985 | | NA |
| 1986 | 43.07 | NA |
| 1987 | 37.97 | -11.83 % |
| 1988 | 39.61 | 4.31 % |
| 1989 | 38.57 | -2.64 % |
| 1990 | 40.50 | 5.00 % |
| 1991 | 45.33 | 11.93 % |
| 1992 | 43.94 | -3.06 % |
| 1993 | 45.17 | 2.80 % |
| 1994 | 44.46 | -1.57 % |
| 1995 | 44.06 | -0.90 % |
| 1996 | 39.74 | -9.79 % |
| 1997 | 51.23 | 28.91 % |
| 1998 | 50.03 | -2.34 % |
| 1999 | 54.73 | 9.38 % |
| 2000 | 50.63 | -7.49 % |
| 2001 | 57.43 | 13.44 % |
| 2002 | 53.65 | -6.59 % |
| 2003 | 56.26 | 4.88 % |
| 2004 | 56.35 | 0.15 % |
| 2005 | 61.51 | 9.15 % |
| 2006 | 53.57 | -12.90 % |
| 2007 | 56.29 | 5.07 % |
| 2008 | 56.60 | 0.55 % |
| 2009 | 53.44 | -5.57 % |
| 2010 | 63.98 | 19.72 % |
|
|
