|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 7,691.93 | 7,503.43 |
| 1993 | 7,624.69 | 7,618.07 |
| 1994 | 7,561.86 | 7,975.22 |
| 1995 | 7,990.66 | 8,195.69 |
| 1996 | 7,876.02 | 8,082.15 |
| 1997 | 8,204.50 | 8,314.73 |
| 1998 | 9,012.50 | 9,370.75 |
| 1999 | 8,129.55 | 8,498.82 |
| 2000 | 8,284.97 | 8,660.86 |
| 2001 | 8,935.34 | 9,353.11 |
| 2002 | 8,355.52 | 8,092.07 |
| 2003 | 8,137.26 | 8,305.92 |
| 2004 | 7,986.25 | 8,291.59 |
| 2005 | 7,585.00 | 8,151.59 |
| 2006 | 7,318.25 | 7,464.85 |
| 2007 | 7,174.95 | 7,561.86 |
| 2008 | 8,410.64 | 8,368.75 |
| 2009 | 8,185.76 | 8,159.31 |
| 2010 | 7,411.94 | 7,557.45 |
| 2011 | 6,568.67 | 6,599.54 |
|
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