|
| year | production | consumption |
| 1980 | | |
| 1981 | | |
| 1982 | | |
| 1983 | | |
| 1984 | | |
| 1985 | | |
| 1986 | | |
| 1987 | | |
| 1988 | | |
| 1989 | | |
| 1990 | | |
| 1991 | | |
| 1992 | 444.00 | 404.14 |
| 1993 | 408.00 | 341.39 |
| 1994 | 415.00 | 297.62 |
| 1995 | 414.00 | 269.19 |
| 1996 | 456.75 | 245.24 |
| 1997 | 521.00 | 217.52 |
| 1998 | 526.00 | 196.64 |
| 1999 | 603.60 | 171.23 |
| 2000 | 718.00 | 194.75 |
| 2001 | 814.86 | 210.45 |
| 2002 | 939.19 | 217.16 |
| 2003 | 1,026.71 | 206.98 |
| 2004 | 1,203.25 | 221.25 |
| 2005 | 1,288.29 | 228.98 |
| 2006 | 1,313.33 | 234.46 |
| 2007 | 1,360.43 | 235.97 |
| 2008 | 1,345.42 | 247.50 |
| 2009 | 1,455.15 | 209.95 |
| 2010 | 1,525.20 | 206.32 |
| 2011 | 1,552.94 | 263.00 |
|
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