|
| year | consumption | change |
| 1980 | 124.00 | NA |
| 1981 | 128.00 | 3.23 % |
| 1982 | 125.00 | -2.34 % |
| 1983 | 119.00 | -4.80 % |
| 1984 | 114.50 | -3.78 % |
| 1985 | 110.00 | -3.93 % |
| 1986 | 113.28 | 2.98 % |
| 1987 | 115.60 | 2.05 % |
| 1988 | 120.99 | 4.67 % |
| 1989 | 123.93 | 2.43 % |
| 1990 | 127.39 | 2.79 % |
| 1991 | 133.50 | 4.80 % |
| 1992 | 152.08 | 13.91 % |
| 1993 | 157.51 | 3.57 % |
| 1994 | 179.80 | 14.15 % |
| 1995 | 186.12 | 3.52 % |
| 1996 | 182.68 | -1.85 % |
| 1997 | 185.13 | 1.34 % |
| 1998 | 191.54 | 3.47 % |
| 1999 | 264.03 | 37.85 % |
| 2000 | 244.92 | -7.24 % |
| 2001 | 245.38 | 0.19 % |
| 2002 | 272.63 | 11.11 % |
| 2003 | 276.58 | 1.45 % |
| 2004 | 318.15 | 15.03 % |
| 2005 | 331.30 | 4.13 % |
| 2006 | 318.48 | -3.87 % |
| 2007 | 327.53 | 2.84 % |
| 2008 | 295.95 | -9.64 % |
| 2009 | 353.27 | 19.37 % |
| 2010 | 382.55 | 8.29 % |
| 2011 | 366.00 | -4.33 % |
|
|