|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 213.47 | 202.51 |
| 1993 | 200.00 | 194.03 |
| 1994 | 184.00 | 186.60 |
| 1995 | 175.00 | 178.54 |
| 1996 | 175.90 | 133.54 |
| 1997 | 172.80 | 128.59 |
| 1998 | 230.00 | 145.84 |
| 1999 | 276.00 | 149.46 |
| 2000 | 280.04 | 136.89 |
| 2001 | 301.17 | 119.89 |
| 2002 | 310.26 | 110.35 |
| 2003 | 320.05 | 110.78 |
| 2004 | 311.43 | 112.60 |
| 2005 | 432.77 | 115.35 |
| 2006 | 639.52 | 114.38 |
| 2007 | 842.08 | 109.40 |
| 2008 | 869.56 | 84.41 |
| 2009 | 1,005.85 | 79.87 |
| 2010 | 1,034.63 | 78.09 |
| 2011 | 982.99 | 168.00 |
|
|