|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 180.94 | 30.73 |
| 1987 | 216.79 | 39.79 |
| 1988 | 205.00 | 32.45 |
| 1989 | 214.15 | 42.81 |
| 1990 | 224.30 | 45.00 |
| 1991 | 239.33 | 40.40 |
| 1992 | 275.02 | 78.06 |
| 1993 | 348.89 | 61.94 |
| 1994 | 372.20 | 97.05 |
| 1995 | 380.39 | 44.23 |
| 1996 | 371.29 | 65.22 |
| 1997 | 311.65 | 75.58 |
| 1998 | 302.79 | 79.74 |
| 1999 | 282.60 | 80.52 |
| 2000 | 236.95 | 80.27 |
| 2001 | 245.16 | 110.28 |
| 2002 | 220.38 | 69.83 |
| 2003 | 203.26 | 56.29 |
| 2004 | 238.87 | 56.87 |
| 2005 | 296.03 | 65.03 |
| 2006 | 285.08 | 53.19 |
| 2007 | 277.29 | 61.62 |
| 2008 | 305.92 | 61.83 |
| 2009 | 308.96 | 113.16 |
| 2010 | 330.53 | 131.36 |
|
|