|
| year | production | consumption |
| 1980 | | 864.21 |
| 1981 | | 1,367.97 |
| 1982 | | 1,535.52 |
| 1983 | | 1,075.86 |
| 1984 | | 1,076.96 |
| 1985 | | 1,096.80 |
| 1986 | | 1,213.65 |
| 1987 | | 1,394.42 |
| 1988 | | 1,230.18 |
| 1989 | | 1,372.38 |
| 1990 | | 1,606.07 |
| 1991 | | 1,287.47 |
| 1992 | | 1,248.42 |
| 1993 | | 1,632.67 |
| 1994 | | 1,719.73 |
| 1995 | | 1,184.99 |
| 1996 | | 1,639.14 |
| 1997 | | 1,373.48 |
| 1998 | | 1,340.41 |
| 1999 | 42.99 | 1,208.13 |
| 2000 | 63.93 | 1,515.68 |
| 2001 | 40.79 | 1,295.22 |
| 2002 | 40.79 | 1,420.88 |
| 2003 | 40.79 | 1,472.69 |
| 2004 | 36.38 | 1,502.45 |
| 2005 | 27.56 | 1,468.28 |
| 2006 | | 1,435.21 |
| 2007 | | 1,404.35 |
| 2008 | | 1,373.48 |
| 2009 | | 1,350.33 |
| 2010 | | 1,316.16 |
| 2011 | 26.46 | 1,316.16 |
|
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