|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 189.62 | 185.59 |
| 1987 | 196.55 | 180.72 |
| 1988 | 196.66 | 185.86 |
| 1989 | 202.76 | 180.59 |
| 1990 | 214.23 | 197.57 |
| 1991 | 218.80 | 187.75 |
| 1992 | 217.62 | 179.01 |
| 1993 | 220.60 | 176.54 |
| 1994 | 226.98 | 189.80 |
| 1995 | 226.32 | 178.19 |
| 1996 | 229.48 | 171.42 |
| 1997 | 237.51 | 209.28 |
| 1998 | 237.36 | 220.46 |
| 1999 | 232.03 | 207.13 |
| 2000 | 210.20 | 187.09 |
| 2001 | 214.22 | 187.34 |
| 2002 | 200.57 | 160.21 |
| 2003 | 197.00 | 157.84 |
| 2004 | 213.28 | 190.64 |
| 2005 | 222.30 | 179.75 |
| 2006 | 203.15 | 191.21 |
| 2007 | 200.51 | 191.59 |
| 2008 | 173.87 | 163.71 |
| 2009 | 175.09 | 137.19 |
| 2010 | 169.15 | 147.14 |
|
|