|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 125.46 | 130.23 |
| 1993 | 67.77 | 86.70 |
| 1994 | 70.11 | 84.55 |
| 1995 | 58.66 | 90.77 |
| 1996 | 49.83 | 72.27 |
| 1997 | 65.51 | 74.78 |
| 1998 | 68.78 | 72.38 |
| 1999 | 68.24 | 76.84 |
| 2000 | 48.20 | 57.01 |
| 2001 | 107.50 | 119.28 |
| 2002 | 107.22 | 107.74 |
| 2003 | 100.68 | 95.09 |
| 2004 | 102.38 | 97.49 |
| 2005 | 107.71 | 103.81 |
| 2006 | 91.75 | 110.82 |
| 2007 | 97.24 | 122.25 |
| 2008 | 75.32 | 123.67 |
| 2009 | 76.16 | 109.98 |
| 2010 | 67.19 | 102.08 |
|
|