|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | 216.72 | 214.14 |
| 1992 | 250.36 | 206.84 |
| 1993 | 253.87 | 194.08 |
| 1994 | 248.55 | 185.68 |
| 1995 | 240.01 | 195.02 |
| 1996 | 235.37 | 176.17 |
| 1997 | 215.95 | 155.63 |
| 1998 | 239.45 | 160.26 |
| 1999 | 208.89 | 146.68 |
| 2000 | 230.30 | 168.13 |
| 2001 | 233.08 | 182.80 |
| 2002 | 215.31 | 182.40 |
| 2003 | 216.15 | 183.21 |
| 2004 | 246.99 | 181.24 |
| 2005 | 235.77 | 175.78 |
| 2006 | 241.82 | 177.93 |
| 2007 | 241.53 | 163.46 |
| 2008 | 211.88 | 172.10 |
| 2009 | 172.40 | 158.96 |
| 2010 | 140.36 | 154.91 |
|
|