|
| year | production | consumption |
| 1984 | 1,239.91 | 1,277.63 |
| 1985 | 1,299.26 | 1,324.73 |
| 1986 | 1,408.29 | 1,414.11 |
| 1987 | 1,472.95 | 1,497.99 |
| 1988 | 1,502.29 | 1,565.43 |
| 1989 | 1,538.86 | 1,613.83 |
| 1990 | 1,631.35 | 1,645.07 |
| 1991 | 1,573.56 | 1,586.80 |
| 1992 | 1,533.01 | 1,576.15 |
| 1993 | 1,563.95 | 1,590.57 |
| 1994 | 1,592.65 | 1,656.20 |
| 1995 | 1,561.26 | 1,647.14 |
| 1996 | 1,664.58 | 1,720.93 |
| 1997 | 1,707.18 | 1,746.67 |
| 1998 | 1,681.78 | 1,778.02 |
| 1999 | 1,724.57 | 1,836.68 |
| 2000 | 1,756.88 | 1,889.99 |
| 2001 | 1,677.86 | 1,811.00 |
| 2002 | 1,655.05 | 1,778.19 |
| 2003 | 1,638.48 | 1,735.41 |
| 2004 | 1,707.66 | 1,801.57 |
| 2005 | 1,702.96 | 1,856.66 |
| 2006 | 1,628.79 | 1,811.48 |
| 2007 | 1,600.79 | 1,809.59 |
| 2008 | 1,645.14 | 1,722.93 |
| 2009 | 1,536.94 | 1,551.77 |
| 2010 | 1,552.97 | 1,593.55 |
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