|
| year | consumption | change |
| 1980 | 328.49 | NA |
| 1981 | 281.09 | -14.43 % |
| 1982 | 175.27 | -37.65 % |
| 1983 | 227.08 | 29.56 % |
| 1984 | 231.49 | 1.94 % |
| 1985 | 317.47 | 37.14 % |
| 1986 | 336.21 | 5.90 % |
| 1987 | 256.84 | -23.61 % |
| 1988 | 351.64 | 36.91 % |
| 1989 | 372.58 | 5.96 % |
| 1990 | 246.43 | -33.86 % |
| 1991 | .68 | -99.72 % |
| 1992 | 5.04 | 637.10 % |
| 1993 | 42.98 | 753.17 % |
| 1994 | 84.02 | 95.49 % |
| 1995 | 7.96 | -90.53 % |
| 1996 | 232.53 | 2,821.74 % |
| 1997 | 52.02 | -77.63 % |
| 1998 | 1,463.09 | 2,712.65 % |
| 1999 | 55.38 | -96.21 % |
| 2000 | 198.99 | 259.32 % |
| 2001 | 74.34 | -62.64 % |
| 2002 | 27.09 | -63.55 % |
| 2003 | 65.04 | 140.03 % |
| 2004 | 212.29 | 226.42 % |
| 2005 | 55.31 | -73.94 % |
| 2006 | 173.14 | 213.01 % |
| 2007 | 209.34 | 20.91 % |
| 2008 | 212.89 | 1.70 % |
| 2009 | 357.73 | 68.04 % |
| 2010 | 328.49 | -8.17 % |
| 2011 | 220.46 | -32.89 % |
|
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