|
| year | consumption | change |
| 1980 | | NA |
| 1981 | | NA |
| 1982 | | NA |
| 1983 | 2.51 | NA |
| 1984 | 1.41 | -43.66 % |
| 1985 | | NA |
| 1986 | 16.00 | NA |
| 1987 | 26.00 | 62.50 % |
| 1988 | 43.00 | 65.38 % |
| 1989 | 114.00 | 165.12 % |
| 1990 | 122.47 | 7.43 % |
| 1991 | 149.63 | 22.17 % |
| 1992 | 163.65 | 9.37 % |
| 1993 | 181.87 | 11.14 % |
| 1994 | 192.33 | 5.75 % |
| 1995 | 248.23 | 29.07 % |
| 1996 | 290.08 | 16.86 % |
| 1997 | 346.09 | 19.31 % |
| 1998 | 365.55 | 5.62 % |
| 1999 | 442.43 | 21.03 % |
| 2000 | 523.90 | 18.41 % |
| 2001 | 563.06 | 7.48 % |
| 2002 | 621.12 | 10.31 % |
| 2003 | 748.01 | 20.43 % |
| 2004 | 792.57 | 5.96 % |
| 2005 | 966.75 | 21.98 % |
| 2006 | 1,101.23 | 13.91 % |
| 2007 | 1,292.49 | 17.37 % |
| 2008 | 1,294.12 | 0.13 % |
| 2009 | 1,240.09 | -4.18 % |
| 2010 | 1,346.46 | 8.58 % |
| 2011 | 1,579.04 | 17.27 % |
|
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