|
| year | production | consumption |
| 1980 | 65.00 | |
| 1981 | 83.00 | |
| 1982 | 89.00 | |
| 1983 | 87.00 | |
| 1984 | 121.00 | |
| 1985 | 120.00 | 5.75 |
| 1986 | 119.00 | 5.81 |
| 1987 | 123.00 | 6.50 |
| 1988 | 144.00 | 5.82 |
| 1989 | 164.00 | 6.50 |
| 1990 | 165.00 | 7.11 |
| 1991 | 156.00 | 6.22 |
| 1992 | 174.00 | 5.79 |
| 1993 | 181.04 | 5.43 |
| 1994 | 180.00 | 5.27 |
| 1995 | 188.00 | 5.19 |
| 1996 | 201.00 | 5.02 |
| 1997 | 253.00 | 5.00 |
| 1998 | 265.00 | 5.05 |
| 1999 | 270.00 | 4.18 |
| 2000 | 280.00 | 4.40 |
| 2001 | 255.00 | 5.59 |
| 2002 | 249.20 | 4.83 |
| 2003 | 246.85 | 6.04 |
| 2004 | 235.48 | 6.71 |
| 2005 | 228.62 | 7.55 |
| 2006 | 241.64 | 8.23 |
| 2007 | 207.17 | 9.06 |
| 2008 | 233.27 | 9.98 |
| 2009 | 267.86 | 11.67 |
| 2010 | 305.00 | 13.61 |
| 2011 | 290.00 | 13.00 |
|
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