|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 102.83 | 117.20 |
| 1987 | 101.66 | 100.00 |
| 1988 | 101.50 | 100.24 |
| 1989 | 101.89 | 99.60 |
| 1990 | 104.95 | 106.57 |
| 1991 | 101.78 | 157.00 |
| 1992 | 149.07 | 157.56 |
| 1993 | 159.22 | 158.57 |
| 1994 | 164.20 | 166.00 |
| 1995 | 202.21 | 180.03 |
| 1996 | 182.83 | 178.15 |
| 1997 | 184.59 | 184.59 |
| 1998 | 185.13 | 187.53 |
| 1999 | 179.97 | 183.31 |
| 2000 | 185.96 | 175.03 |
| 2001 | 185.74 | 174.78 |
| 2002 | 200.21 | 174.69 |
| 2003 | 212.20 | 181.49 |
| 2004 | 198.55 | 194.04 |
| 2005 | 185.42 | 189.79 |
| 2006 | 185.51 | 190.30 |
| 2007 | 184.06 | 195.19 |
| 2008 | 191.07 | 186.91 |
| 2009 | 182.43 | 205.56 |
| 2010 | 160.57 | 203.48 |
|
|