|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | | .13 |
| 1987 | | .10 |
| 1988 | | .57 |
| 1989 | | .62 |
| 1990 | | .73 |
| 1991 | | .83 |
| 1992 | | .92 |
| 1993 | | .92 |
| 1994 | | .95 |
| 1995 | | 1.14 |
| 1996 | | 1.17 |
| 1997 | | 1.21 |
| 1998 | | 1.21 |
| 1999 | | 1.21 |
| 2000 | | 1.39 |
| 2001 | | 1.56 |
| 2002 | | 1.78 |
| 2003 | | 1.64 |
| 2004 | | 1.71 |
| 2005 | | 1.72 |
| 2006 | | 1.88 |
| 2007 | | 2.03 |
| 2008 | | 2.00 |
| 2009 | | 2.00 |
| 2010 | | 2.03 |
|
|
