|
| year | consumption | change |
| 1980 | 44.80 | NA |
| 1981 | 45.70 | 2.01 % |
| 1982 | 53.50 | 17.07 % |
| 1983 | 49.50 | -7.48 % |
| 1984 | 61.90 | 25.05 % |
| 1985 | 69.24 | 11.86 % |
| 1986 | 66.58 | -3.84 % |
| 1987 | 66.34 | -0.37 % |
| 1988 | 67.82 | 2.23 % |
| 1989 | 73.60 | 8.53 % |
| 1990 | 75.96 | 3.21 % |
| 1991 | 78.48 | 3.31 % |
| 1992 | 83.24 | 6.07 % |
| 1993 | 69.43 | -16.60 % |
| 1994 | 66.20 | -4.66 % |
| 1995 | 72.40 | 9.37 % |
| 1996 | 73.81 | 1.94 % |
| 1997 | 78.96 | 6.98 % |
| 1998 | 85.33 | 8.07 % |
| 1999 | 89.24 | 4.58 % |
| 2000 | 96.62 | 8.27 % |
| 2001 | 102.45 | 6.04 % |
| 2002 | 112.31 | 9.62 % |
| 2003 | 121.49 | 8.17 % |
| 2004 | 123.28 | 1.47 % |
| 2005 | 128.18 | 3.97 % |
| 2006 | 140.07 | 9.28 % |
| 2007 | 121.01 | -13.60 % |
| 2008 | 147.28 | 21.71 % |
| 2009 | 131.17 | -10.94 % |
| 2010 | 131.05 | -0.09 % |
| 2011 | 177.00 | 35.06 % |
|
|