|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 5,137.87 | 6,439.70 |
| 1993 | 4,206.42 | 4,797.26 |
| 1994 | 4,238.39 | 4,886.55 |
| 1995 | 3,414.96 | 3,799.67 |
| 1996 | 3,127.26 | 3,693.85 |
| 1997 | 3,248.51 | 3,077.65 |
| 1998 | 3,222.06 | 3,218.75 |
| 1999 | 3,273.87 | 3,194.50 |
| 2000 | 2,831.84 | 3,839.35 |
| 2001 | 2,988.37 | 3,955.09 |
| 2002 | 3,017.03 | 3,949.58 |
| 2003 | 2,108.72 | 3,040.18 |
| 2004 | 3,068.84 | 3,563.77 |
| 2005 | 3,390.71 | 3,433.70 |
| 2006 | 3,565.98 | 3,681.72 |
| 2007 | 3,794.16 | 3,892.26 |
| 2008 | 3,626.60 | 3,877.93 |
| 2009 | 4,027.85 | 4,207.52 |
| 2010 | 3,681.72 | 3,776.52 |
| 2011 | 3,132.77 | 3,227.57 |
|
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