|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 139.10 | 84.10 |
| 1987 | 138.93 | 83.74 |
| 1988 | 138.74 | 83.71 |
| 1989 | 142.78 | 74.09 |
| 1990 | 127.49 | 81.96 |
| 1991 | 80.81 | 63.52 |
| 1992 | 76.00 | 68.19 |
| 1993 | 76.56 | 58.43 |
| 1994 | 96.24 | 53.42 |
| 1995 | 96.08 | 57.82 |
| 1996 | 85.68 | 71.39 |
| 1997 | 80.84 | 62.02 |
| 1998 | 82.52 | 56.50 |
| 1999 | 64.16 | 49.75 |
| 2000 | 78.29 | 58.93 |
| 2001 | 94.68 | 64.56 |
| 2002 | 95.84 | 57.41 |
| 2003 | 81.51 | 68.15 |
| 2004 | 85.00 | 62.51 |
| 2005 | 96.24 | 59.83 |
| 2006 | 93.87 | 62.32 |
| 2007 | 95.24 | 78.75 |
| 2008 | 98.94 | 93.34 |
| 2009 | 90.38 | 84.48 |
| 2010 | 78.38 | 84.25 |
|
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