|
| year | production | consumption |
| 1980 | 1,787.00 | 100.00 |
| 1981 | 1,140.00 | 115.00 |
| 1982 | 1,150.00 | 124.00 |
| 1983 | 1,105.00 | 125.00 |
| 1984 | 1,087.00 | 120.00 |
| 1985 | 1,059.00 | 128.28 |
| 1986 | 1,034.00 | 124.69 |
| 1987 | 972.00 | 134.23 |
| 1988 | 1,175.00 | 142.01 |
| 1989 | 1,150.00 | 147.00 |
| 1990 | 1,375.00 | 155.00 |
| 1991 | 1,483.15 | 165.97 |
| 1992 | 1,432.70 | 149.72 |
| 1993 | 1,361.00 | 160.07 |
| 1994 | 1,377.59 | 165.64 |
| 1995 | 1,390.00 | 178.51 |
| 1996 | 1,400.85 | 186.83 |
| 1997 | 1,445.92 | 198.91 |
| 1998 | 1,390.00 | 187.21 |
| 1999 | 1,318.96 | 191.56 |
| 2000 | 1,410.03 | 210.28 |
| 2001 | 1,366.55 | 225.17 |
| 2002 | 1,318.52 | 233.35 |
| 2003 | 1,420.52 | 244.09 |
| 2004 | 1,515.22 | 254.51 |
| 2005 | 1,633.11 | 264.93 |
| 2006 | 1,681.04 | 267.91 |
| 2007 | 1,701.81 | 271.29 |
| 2008 | 1,735.83 | 257.67 |
| 2009 | 1,650.00 | 262.93 |
| 2010 | 1,650.00 | 280.32 |
| 2011 | 465.40 | 314.00 |
|
|