|
| year | consumption | change |
| 1980 | 380.00 | NA |
| 1981 | 340.00 | -10.53 % |
| 1982 | 330.00 | -2.94 % |
| 1983 | 337.00 | 2.12 % |
| 1984 | 384.00 | 13.95 % |
| 1985 | 378.00 | -1.56 % |
| 1986 | 405.26 | 7.21 % |
| 1987 | 419.82 | 3.59 % |
| 1988 | 482.63 | 14.96 % |
| 1989 | 521.31 | 8.02 % |
| 1990 | 541.51 | 3.87 % |
| 1991 | 545.26 | 0.69 % |
| 1992 | 557.10 | 2.17 % |
| 1993 | 616.43 | 10.65 % |
| 1994 | 658.66 | 6.85 % |
| 1995 | 736.90 | 11.88 % |
| 1996 | 780.35 | 5.90 % |
| 1997 | 775.00 | -0.69 % |
| 1998 | 807.80 | 4.23 % |
| 1999 | 852.64 | 5.55 % |
| 2000 | 865.30 | 1.49 % |
| 2001 | 881.72 | 1.90 % |
| 2002 | 893.74 | 1.36 % |
| 2003 | 929.90 | 4.05 % |
| 2004 | 948.02 | 1.95 % |
| 2005 | 939.49 | -0.90 % |
| 2006 | 959.91 | 2.17 % |
| 2007 | 952.50 | -0.77 % |
| 2008 | 888.79 | -6.69 % |
| 2009 | 933.26 | 5.00 % |
| 2010 | 971.99 | 4.15 % |
| 2011 | 929.00 | -4.42 % |
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