|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 286.60 | 2,958.60 |
| 1993 | 197.31 | 2,575.00 |
| 1994 | 122.36 | 2,534.21 |
| 1995 | 35.27 | 1,500.25 |
| 1996 | 39.68 | 1,300.73 |
| 1997 | 52.91 | 731.93 |
| 1998 | 8.82 | 621.70 |
| 1999 | | 263.45 |
| 2000 | | 210.54 |
| 2001 | | 165.35 |
| 2002 | | 176.37 |
| 2003 | | 249.12 |
| 2004 | | 207.23 |
| 2005 | | 186.29 |
| 2006 | | 213.85 |
| 2007 | | 144.40 |
| 2008 | | 218.26 |
| 2009 | | 199.52 |
| 2010 | | 205.03 |
| 2011 | | 169.76 |
|
|
