|
| year | production | consumption |
| 1980 | | 8,014.91 |
| 1981 | | 6,947.87 |
| 1982 | | 4,555.85 |
| 1983 | | 4,735.53 |
| 1984 | | 5,434.40 |
| 1985 | | 7,082.35 |
| 1986 | | 6,232.47 |
| 1987 | | 7,504.54 |
| 1988 | | 7,276.36 |
| 1989 | | 7,193.68 |
| 1990 | | 7,091.17 |
| 1991 | | 6,982.26 |
| 1992 | | 6,077.04 |
| 1993 | | 7,195.89 |
| 1994 | | 8,983.84 |
| 1995 | | 7,508.95 |
| 1996 | | 8,812.54 |
| 1997 | | 8,203.40 |
| 1998 | | 6,219.24 |
| 1999 | | 6,224.75 |
| 2000 | | 6,311.84 |
| 2001 | | 7,263.13 |
| 2002 | | 7,805.47 |
| 2003 | | 10,352.91 |
| 2004 | | 9,468.85 |
| 2005 | | 5,643.83 |
| 2006 | | 8,995.96 |
| 2007 | | 8,402.92 |
| 2008 | | 6,045.08 |
| 2009 | | 6,293.10 |
| 2010 | | 8,184.66 |
| 2011 | | 6,467.26 |
|
|
