|
| year | production | consumption |
| 1980 | 2,514.00 | 217.00 |
| 1981 | 1,000.00 | 214.00 |
| 1982 | 1,012.00 | 205.00 |
| 1983 | 1,005.00 | 250.00 |
| 1984 | 1,209.00 | 240.00 |
| 1985 | 1,433.00 | 258.31 |
| 1986 | 1,690.00 | 279.22 |
| 1987 | 2,079.00 | 285.03 |
| 1988 | 2,685.00 | 319.72 |
| 1989 | 2,897.00 | 349.97 |
| 1990 | 2,040.00 | 400.00 |
| 1991 | 305.00 | 262.80 |
| 1992 | 425.00 | 341.44 |
| 1993 | 511.70 | 409.13 |
| 1994 | 552.53 | 456.60 |
| 1995 | 560.00 | 474.13 |
| 1996 | 578.80 | 469.46 |
| 1997 | 1,155.00 | 443.35 |
| 1998 | 2,150.04 | 447.36 |
| 1999 | 2,507.88 | 451.29 |
| 2000 | 2,570.68 | 462.32 |
| 2001 | 2,390.00 | 489.08 |
| 2002 | 2,023.00 | 497.37 |
| 2003 | 1,308.25 | 457.38 |
| 2004 | 2,011.47 | 502.66 |
| 2005 | 1,877.66 | 541.03 |
| 2006 | 1,995.60 | 532.99 |
| 2007 | 2,086.29 | 570.81 |
| 2008 | 2,375.27 | 584.99 |
| 2009 | 2,390.59 | 643.45 |
| 2010 | 2,399.30 | 662.04 |
| 2011 | 2,625.69 | 818.00 |
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