|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | | |
| 1993 | 16.04 | 10.93 |
| 1994 | 15.61 | 11.48 |
| 1995 | 18.75 | 12.38 |
| 1996 | 19.09 | 11.20 |
| 1997 | 19.28 | 14.91 |
| 1998 | 21.12 | 15.44 |
| 1999 | 23.52 | 14.89 |
| 2000 | 31.79 | 13.90 |
| 2001 | 33.31 | 14.17 |
| 2002 | 36.00 | 16.81 |
| 2003 | 36.97 | 15.47 |
| 2004 | 39.11 | 14.17 |
| 2005 | 39.01 | 14.88 |
| 2006 | 35.42 | 14.04 |
| 2007 | 38.36 | 14.70 |
| 2008 | 35.86 | 15.54 |
| 2009 | 34.84 | 14.61 |
| 2010 | 29.50 | 14.49 |
|
|