|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 210.67 | 277.48 |
| 1987 | 200.06 | 278.71 |
| 1988 | 222.69 | 276.66 |
| 1989 | 200.94 | 306.97 |
| 1990 | 206.26 | 163.96 |
| 1991 | 205.02 | 177.54 |
| 1992 | 214.57 | 176.59 |
| 1993 | 256.02 | 185.74 |
| 1994 | 261.93 | 203.43 |
| 1995 | 258.57 | 243.27 |
| 1996 | 282.66 | 284.71 |
| 1997 | 314.29 | 311.38 |
| 1998 | 348.10 | 327.42 |
| 1999 | 329.03 | 311.33 |
| 2000 | 478.77 | 579.50 |
| 2001 | 338.74 | 491.85 |
| 2002 | 335.61 | 279.15 |
| 2003 | 322.01 | 277.54 |
| 2004 | 337.75 | 303.66 |
| 2005 | 348.49 | 307.87 |
| 2006 | 369.85 | 309.35 |
| 2007 | 393.95 | 331.18 |
| 2008 | 364.08 | 327.06 |
| 2009 | 373.64 | 329.42 |
| 2010 | 398.92 | 393.08 |
|
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