|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 326.50 | 310.87 |
| 1993 | 184.68 | 212.65 |
| 1994 | 140.34 | 165.73 |
| 1995 | 126.98 | 153.81 |
| 1996 | 96.94 | 119.16 |
| 1997 | 82.19 | 106.56 |
| 1998 | 86.54 | 100.11 |
| 1999 | 85.79 | 108.36 |
| 2000 | 60.68 | 44.63 |
| 2001 | 137.35 | 60.09 |
| 2002 | 140.48 | 94.84 |
| 2003 | 151.41 | 17.92 |
| 2004 | 154.05 | 24.76 |
| 2005 | 148.99 | 30.48 |
| 2006 | 74.76 | 22.01 |
| 2007 | 63.41 | 19.87 |
| 2008 | 44.89 | 17.10 |
| 2009 | 50.71 | 36.15 |
| 2010 | 57.19 | 20.88 |
|
|