|
| year | consumption | change |
| 1980 | 370.91 | NA |
| 1981 | 341.18 | -8.02 % |
| 1982 | 281.53 | -17.48 % |
| 1983 | 296.93 | 5.47 % |
| 1984 | 306.32 | 3.16 % |
| 1985 | 305.72 | -0.20 % |
| 1986 | 272.38 | -10.90 % |
| 1987 | 303.71 | 11.50 % |
| 1988 | 298.59 | -1.69 % |
| 1989 | 332.17 | 11.25 % |
| 1990 | 340.61 | 2.54 % |
| 1991 | 363.32 | 6.67 % |
| 1992 | 374.44 | 3.06 % |
| 1993 | 391.85 | 4.65 % |
| 1994 | 400.65 | 2.25 % |
| 1995 | 443.24 | 10.63 % |
| 1996 | 492.68 | 11.15 % |
| 1997 | 469.97 | -4.61 % |
| 1998 | 517.58 | 10.13 % |
| 1999 | 551.06 | 6.47 % |
| 2000 | 553.85 | 0.51 % |
| 2001 | 546.78 | -1.28 % |
| 2002 | 563.52 | 3.06 % |
| 2003 | 600.36 | 6.54 % |
| 2004 | 611.80 | 1.91 % |
| 2005 | 601.41 | -1.70 % |
| 2006 | 619.04 | 2.93 % |
| 2007 | 623.66 | 0.75 % |
| 2008 | 619.43 | -0.68 % |
| 2009 | 625.50 | 0.98 % |
| 2010 | 699.73 | 11.87 % |
| 2011 | 596.19 | -14.80 % |
|
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