|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 132.28 | 790.36 |
| 1993 | 126.88 | 847.57 |
| 1994 | 113.76 | 574.08 |
| 1995 | 90.61 | 295.42 |
| 1996 | 73.08 | 429.24 |
| 1997 | 53.50 | 588.01 |
| 1998 | 61.51 | 467.05 |
| 1999 | 16.88 | 308.65 |
| 2000 | | 899.78 |
| 2001 | | 877.44 |
| 2002 | | 1,082.47 |
| 2003 | | 1,256.64 |
| 2004 | | 1,332.69 |
| 2005 | | 1,281.99 |
| 2006 | | 1,203.72 |
| 2007 | | 1,294.11 |
| 2008 | | 1,330.49 |
| 2009 | | 963.42 |
| 2010 | | 1,290.81 |
| 2011 | | 1,814.41 |
|
|