|
| year | production | consumption |
| 1980 | | 202.50 |
| 1981 | | 207.00 |
| 1982 | 10.00 | 223.50 |
| 1983 | 12.00 | 205.60 |
| 1984 | 15.00 | 212.80 |
| 1985 | 17.00 | 217.28 |
| 1986 | 18.00 | 222.91 |
| 1987 | 18.00 | 218.61 |
| 1988 | 15.00 | 221.18 |
| 1989 | 15.00 | 224.80 |
| 1990 | 14.30 | 219.55 |
| 1991 | 14.00 | 203.67 |
| 1992 | 16.49 | 180.00 |
| 1993 | 19.50 | 179.45 |
| 1994 | 24.18 | 182.95 |
| 1995 | 26.00 | 187.41 |
| 1996 | 30.00 | 192.42 |
| 1997 | 30.29 | 200.00 |
| 1998 | 31.50 | 194.00 |
| 1999 | 38.00 | 195.00 |
| 2000 | 41.00 | 195.00 |
| 2001 | 50.00 | 203.60 |
| 2002 | 47.30 | 201.51 |
| 2003 | 55.17 | 204.85 |
| 2004 | 57.93 | 228.50 |
| 2005 | 52.27 | 198.04 |
| 2006 | 51.64 | 157.09 |
| 2007 | 50.54 | 161.31 |
| 2008 | 52.25 | 141.40 |
| 2009 | 48.24 | 169.55 |
| 2010 | 53.00 | 163.94 |
| 2011 | 55.00 | 165.00 |
|
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