|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | | |
| 1993 | | |
| 1994 | | |
| 1995 | | |
| 1996 | | |
| 1997 | | |
| 1998 | .71 | .71 |
| 1999 | .71 | .71 |
| 2000 | 1.06 | 1.06 |
| 2001 | 1.06 | 1.06 |
| 2002 | 44.85 | 44.85 |
| 2003 | 45.91 | 45.91 |
| 2004 | 3.53 | 3.53 |
| 2005 | 45.91 | 45.91 |
| 2006 | 45.91 | 45.91 |
| 2007 | 103.12 | 52.65 |
| 2008 | 210.12 | 52.62 |
| 2009 | 221.43 | 54.74 |
| 2010 | 230.96 | 55.80 |
| 2011 | 242.97 | 57.21 |
|
|