|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 235.89 | 508.17 |
| 1993 | 191.80 | 144.40 |
| 1994 | 116.85 | 88.18 |
| 1995 | 37.48 | 37.48 |
| 1996 | 22.05 | 22.05 |
| 1997 | 18.74 | 44.09 |
| 1998 | 20.94 | 35.27 |
| 1999 | 20.94 | 26.46 |
| 2000 | 24.25 | 33.07 |
| 2001 | 26.46 | 35.27 |
| 2002 | 39.68 | 48.50 |
| 2003 | 51.81 | 61.73 |
| 2004 | 102.52 | 111.33 |
| 2005 | 109.13 | 116.85 |
| 2006 | 115.74 | 123.46 |
| 2007 | 199.52 | 209.44 |
| 2008 | 219.36 | 229.28 |
| 2009 | 222.67 | 238.10 |
| 2010 | 220.46 | 240.30 |
| 2011 | 220.46 | 225.97 |
|
|
