|
| year | production | consumption |
| 1984 | 245.38 | 230.41 |
| 1985 | 245.74 | 241.76 |
| 1986 | 242.83 | 232.02 |
| 1987 | 232.38 | 232.58 |
| 1988 | 206.27 | 213.19 |
| 1989 | 234.30 | 227.18 |
| 1990 | 258.59 | 233.50 |
| 1991 | 276.06 | 258.86 |
| 1992 | 277.84 | 268.69 |
| 1993 | 273.24 | 256.97 |
| 1994 | 289.85 | 293.02 |
| 1995 | 259.68 | 270.07 |
| 1996 | 274.84 | 287.90 |
| 1997 | 280.15 | 309.92 |
| 1998 | 290.29 | 334.35 |
| 1999 | 273.33 | 320.02 |
| 2000 | 265.79 | 328.67 |
| 2001 | 282.02 | 318.31 |
| 2002 | 271.08 | 305.35 |
| 2003 | 306.47 | 333.02 |
| 2004 | 325.08 | 342.13 |
| 2005 | 318.63 | 360.23 |
| 2006 | 329.04 | 385.98 |
| 2007 | 336.78 | 400.91 |
| 2008 | 353.89 | 427.69 |
| 2009 | 387.28 | 406.84 |
| 2010 | 360.50 | 418.43 |
|
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