|
| year | consumption | change |
| 1980 | 1,459.46 | NA |
| 1981 | 1,527.80 | 4.68 % |
| 1982 | 1,650.16 | 8.01 % |
| 1983 | 1,868.42 | 13.23 % |
| 1984 | 1,817.71 | -2.71 % |
| 1985 | 1,876.13 | 3.21 % |
| 1986 | 2,526.50 | 34.67 % |
| 1987 | 2,580.51 | 2.14 % |
| 1988 | 2,544.14 | -1.41 % |
| 1989 | 2,544.14 | 0.00 % |
| 1990 | 2,527.60 | -0.65 % |
| 1991 | 2,860.50 | 13.17 % |
| 1992 | 2,565.08 | -10.33 % |
| 1993 | 2,878.14 | 12.20 % |
| 1994 | 3,163.63 | 9.92 % |
| 1995 | 3,615.58 | 14.29 % |
| 1996 | 4,176.66 | 15.52 % |
| 1997 | 3,831.63 | -8.26 % |
| 1998 | 4,369.56 | 14.04 % |
| 1999 | 4,008.00 | -8.27 % |
| 2000 | 4,463.26 | 11.36 % |
| 2001 | 5,625.10 | 26.03 % |
| 2002 | 5,762.88 | 2.45 % |
| 2003 | 5,390.30 | -6.47 % |
| 2004 | 5,132.36 | -4.79 % |
| 2005 | 5,443.21 | 6.06 % |
| 2006 | 5,429.99 | -0.24 % |
| 2007 | 5,532.50 | 1.89 % |
| 2008 | 4,918.51 | -11.10 % |
| 2009 | 4,518.37 | -8.14 % |
| 2010 | 4,655.06 | 3.03 % |
| 2011 | 5,357.23 | 15.08 % |
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