|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 202.00 | 151.60 |
| 1987 | 217.00 | 155.00 |
| 1988 | 246.00 | 155.60 |
| 1989 | 234.00 | 152.00 |
| 1990 | 240.00 | 160.00 |
| 1991 | 254.97 | 161.40 |
| 1992 | 248.36 | 181.83 |
| 1993 | 245.38 | 197.99 |
| 1994 | 254.90 | 203.87 |
| 1995 | 248.02 | 209.38 |
| 1996 | 259.00 | 220.62 |
| 1997 | 254.29 | 225.36 |
| 1998 | 259.09 | 227.34 |
| 1999 | 291.68 | 225.59 |
| 2000 | 293.33 | 227.89 |
| 2001 | 289.74 | 236.04 |
| 2002 | 272.47 | 256.19 |
| 2003 | 294.46 | 265.65 |
| 2004 | 339.57 | 280.58 |
| 2005 | 347.63 | 301.68 |
| 2006 | 281.02 | 362.63 |
| 2007 | 351.72 | 347.16 |
| 2008 | 339.75 | 374.53 |
| 2009 | 355.13 | 397.59 |
| 2010 | 375.55 | 414.65 |
|
|