|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 2,371.07 | 2,734.83 |
| 1993 | 1,897.08 | 2,444.93 |
| 1994 | 931.45 | 2,237.69 |
| 1995 | 510.37 | 1,298.52 |
| 1996 | 443.13 | 1,119.95 |
| 1997 | 575.41 | 1,356.95 |
| 1998 | 482.81 | 1,350.33 |
| 1999 | 459.66 | 1,343.72 |
| 2000 | 468.48 | 1,288.60 |
| 2001 | 523.60 | 874.13 |
| 2002 | 505.96 | 1,369.07 |
| 2003 | 458.56 | 1,612.68 |
| 2004 | 499.35 | 1,585.12 |
| 2005 | 369.27 | 1,477.10 |
| 2006 | 353.84 | 1,381.20 |
| 2007 | 435.41 | 1,122.15 |
| 2008 | 542.34 | 1,100.11 |
| 2009 | 663.59 | 1,142.00 |
| 2010 | 641.55 | 1,263.25 |
| 2011 | 931.45 | 1,553.16 |
|
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