|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 239.75 | 60.04 |
| 1987 | 210.76 | 65.39 |
| 1988 | 258.03 | 66.39 |
| 1989 | 232.27 | 63.45 |
| 1990 | 244.13 | 68.20 |
| 1991 | 296.19 | 65.19 |
| 1992 | 293.30 | 65.73 |
| 1993 | 276.21 | 64.50 |
| 1994 | 265.72 | 64.38 |
| 1995 | 258.46 | 67.38 |
| 1996 | 254.93 | 67.47 |
| 1997 | 268.47 | 70.02 |
| 1998 | 276.04 | 94.26 |
| 1999 | 277.59 | 70.30 |
| 2000 | 297.30 | 68.13 |
| 2001 | 293.66 | 112.65 |
| 2002 | 272.14 | 110.53 |
| 2003 | 232.48 | 103.31 |
| 2004 | 300.15 | 137.62 |
| 2005 | 299.67 | 137.90 |
| 2006 | 279.43 | 134.52 |
| 2007 | 293.13 | 160.60 |
| 2008 | 297.99 | 163.26 |
| 2009 | 326.38 | 185.63 |
| 2010 | 257.27 | 166.46 |
|
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