|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 35.55 | 190.42 |
| 1993 | 47.00 | 178.55 |
| 1994 | 75.00 | 172.83 |
| 1995 | 115.00 | 184.74 |
| 1996 | 114.75 | 144.06 |
| 1997 | 112.35 | 139.87 |
| 1998 | 116.00 | 147.02 |
| 1999 | 102.00 | 150.14 |
| 2000 | 91.34 | 146.09 |
| 2001 | 85.00 | 148.26 |
| 2002 | 79.43 | 151.36 |
| 2003 | 90.04 | 150.47 |
| 2004 | 81.00 | 152.11 |
| 2005 | 67.53 | 145.26 |
| 2006 | 58.84 | 137.21 |
| 2007 | 65.00 | 141.63 |
| 2008 | 62.08 | 85.74 |
| 2009 | 60.00 | 94.03 |
| 2010 | 60.00 | 96.45 |
| 2011 | 60.00 | 147.00 |
|
|