|
| year | consumption | change |
| 1980 | 1,620.29 | NA |
| 1981 | 1,855.14 | 14.49 % |
| 1982 | 2,483.73 | 33.88 % |
| 1983 | 2,353.44 | -5.25 % |
| 1984 | 2,864.91 | 21.73 % |
| 1985 | 5,983.35 | 108.85 % |
| 1986 | 6,297.05 | 5.24 % |
| 1987 | 7,902.97 | 25.50 % |
| 1988 | 8,464.36 | 7.10 % |
| 1989 | 10,174.39 | 20.20 % |
| 1990 | 14,227.94 | 39.84 % |
| 1991 | 16,618.10 | 16.80 % |
| 1992 | 17,820.12 | 7.23 % |
| 1993 | 18,516.87 | 3.91 % |
| 1994 | 20,636.46 | 11.45 % |
| 1995 | 23,095.53 | 11.92 % |
| 1996 | 27,819.82 | 20.46 % |
| 1997 | 28,705.09 | 3.18 % |
| 1998 | 24,590.43 | -14.33 % |
| 1999 | 24,478.56 | -0.45 % |
| 2000 | 24,173.74 | -1.25 % |
| 2001 | 27,408.96 | 13.38 % |
| 2002 | 27,707.66 | 1.09 % |
| 2003 | 27,636.05 | -0.26 % |
| 2004 | 30,968.07 | 12.06 % |
| 2005 | 32,640.87 | 5.40 % |
| 2006 | 33,155.99 | 1.58 % |
| 2007 | 35,303.92 | 6.48 % |
| 2008 | 38,287.11 | 8.45 % |
| 2009 | 36,738.93 | -4.04 % |
| 2010 | 39,340.39 | 7.08 % |
| 2011 | 41,625.48 | 5.81 % |
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