|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 2.60 | 6.80 |
| 1993 | 3.51 | 3.51 |
| 1994 | 3.65 | 3.65 |
| 1995 | 2.99 | 2.99 |
| 1996 | 7.39 | 7.57 |
| 1997 | 10.98 | 15.66 |
| 1998 | 13.32 | 17.99 |
| 1999 | 5.54 | 13.93 |
| 2000 | 3.68 | 18.60 |
| 2001 | 15.40 | 23.58 |
| 2002 | 15.77 | 24.16 |
| 2003 | 14.42 | 22.53 |
| 2004 | 19.13 | 22.65 |
| 2005 | 19.75 | 23.37 |
| 2006 | | |
| 2007 | | |
| 2008 | | |
| 2009 | | |
| 2010 | | |
|
|