|
| year | production | consumption |
| 1980 | | 2,924.43 |
| 1981 | | 2,366.66 |
| 1982 | | 2,175.96 |
| 1983 | | 2,002.90 |
| 1984 | | 2,304.93 |
| 1985 | | 2,255.33 |
| 1986 | | 2,063.53 |
| 1987 | | 1,675.51 |
| 1988 | | 1,760.39 |
| 1989 | | 1,846.37 |
| 1990 | | 1,822.12 |
| 1991 | | 1,715.20 |
| 1992 | | 1,618.19 |
| 1993 | | 1,670.00 |
| 1994 | | 1,450.64 |
| 1995 | | 819.02 |
| 1996 | | 766.11 |
| 1997 | | 487.22 |
| 1998 | | 167.55 |
| 1999 | | 168.65 |
| 2000 | | 190.70 |
| 2001 | | 211.64 |
| 2002 | | 126.77 |
| 2003 | | 97.00 |
| 2004 | | 141.10 |
| 2005 | | 135.58 |
| 2006 | | 163.14 |
| 2007 | | 134.48 |
| 2008 | | 136.69 |
| 2009 | | 124.56 |
| 2010 | | 124.56 |
| 2011 | | 109.13 |
|
|
