|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 91.53 | 65.76 |
| 1987 | 180.56 | 73.06 |
| 1988 | 191.60 | 68.51 |
| 1989 | 173.58 | 67.19 |
| 1990 | 201.90 | 90.70 |
| 1991 | 206.04 | 92.07 |
| 1992 | 228.41 | 99.47 |
| 1993 | 225.02 | 98.90 |
| 1994 | 218.69 | 78.21 |
| 1995 | 223.51 | 86.45 |
| 1996 | 173.16 | 84.24 |
| 1997 | 216.16 | 132.79 |
| 1998 | 207.16 | 129.45 |
| 1999 | 208.38 | 122.51 |
| 2000 | 206.73 | 133.60 |
| 2001 | 203.70 | 119.40 |
| 2002 | 218.06 | 130.92 |
| 2003 | 200.72 | 125.34 |
| 2004 | 185.75 | 98.88 |
| 2005 | 198.11 | 120.43 |
| 2006 | 189.25 | 102.03 |
| 2007 | 174.04 | 107.14 |
| 2008 | 172.81 | 117.38 |
| 2009 | 315.54 | 99.24 |
| 2010 | 190.75 | 105.32 |
|
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