|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 152.03 | 157.34 |
| 1987 | 166.84 | 155.40 |
| 1988 | 177.63 | 185.91 |
| 1989 | 175.62 | 174.12 |
| 1990 | 185.28 | 174.68 |
| 1991 | 183.27 | 172.54 |
| 1992 | 206.84 | 180.88 |
| 1993 | 204.68 | 183.39 |
| 1994 | 198.06 | 180.71 |
| 1995 | 190.63 | 210.81 |
| 1996 | 204.28 | 211.67 |
| 1997 | 214.33 | 216.61 |
| 1998 | 292.28 | 302.28 |
| 1999 | 226.53 | 230.89 |
| 2000 | 242.97 | 252.27 |
| 2001 | 251.54 | 240.39 |
| 2002 | 343.50 | 344.80 |
| 2003 | 375.97 | 331.27 |
| 2004 | 407.84 | 280.97 |
| 2005 | 407.43 | 268.85 |
| 2006 | 408.72 | 351.26 |
| 2007 | 459.92 | 396.48 |
| 2008 | 322.67 | 240.91 |
| 2009 | 375.02 | 294.53 |
| 2010 | 427.91 | 323.52 |
|
|