|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 53.68 | 1.95 |
| 1987 | 45.20 | 2.35 |
| 1988 | 43.97 | 1.79 |
| 1989 | 41.83 | 3.62 |
| 1990 | 46.14 | 1.85 |
| 1991 | 56.06 | 1.40 |
| 1992 | 62.59 | 3.56 |
| 1993 | 49.60 | 2.99 |
| 1994 | 45.69 | 5.87 |
| 1995 | 44.00 | 6.29 |
| 1996 | 47.43 | 3.30 |
| 1997 | 46.87 | 3.41 |
| 1998 | 47.32 | 2.21 |
| 1999 | 61.21 | 1.96 |
| 2000 | 61.59 | 3.46 |
| 2001 | 65.21 | 2.04 |
| 2002 | 59.81 | 1.93 |
| 2003 | 61.16 | 7.95 |
| 2004 | 55.80 | 8.04 |
| 2005 | 60.00 | 8.58 |
| 2006 | 55.86 | 5.56 |
| 2007 | 55.23 | 3.23 |
| 2008 | 55.43 | 5.36 |
| 2009 | 48.46 | 5.82 |
| 2010 | 42.00 | 4.76 |
|
|
