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| year | production | consumption |
| 1986 | 35.00 | 35.00 |
| 1987 | 39.00 | 32.00 |
| 1988 | 39.00 | 34.00 |
| 1989 | 41.00 | 36.00 |
| 1990 | 43.00 | 36.00 |
| 1991 | 46.00 | 39.00 |
| 1992 | 64.00 | 43.00 |
| 1993 | 64.00 | 55.00 |
| 1994 | 58.00 | 48.00 |
| 1995 | 56.00 | 54.00 |
| 1996 | 66.00 | 52.00 |
| 1997 | 68.00 | 58.00 |
| 1998 | 64.00 | 58.00 |
| 1999 | 58.00 | 54.00 |
| 2000 | 62.00 | 60.00 |
| 2001 | 66.00 | 63.00 |
| 2002 | 65.00 | 58.00 |
| 2003 | 66.00 | 62.00 |
| 2004 | 73.00 | 67.00 |
| 2005 | 73.00 | 75.00 |
| 2006 | 88.00 | 91.00 |
| 2007 | 90.00 | 93.00 |
| 2008 | 90.00 | 93.00 |
| 2009 | 73.00 | 100.00 |
| 2010 | 76.00 | 108.00 |
| 2011 | 90.00 | 122.00 |
| 2012 | 105.00 | 143.00 |
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