|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 57.58 | 58.25 |
| 1987 | 61.49 | 65.55 |
| 1988 | 65.77 | 65.77 |
| 1989 | 75.77 | 75.67 |
| 1990 | 82.85 | 82.73 |
| 1991 | 81.79 | 81.70 |
| 1992 | 80.17 | 80.38 |
| 1993 | 82.85 | 87.89 |
| 1994 | 95.75 | 89.16 |
| 1995 | 104.28 | 109.35 |
| 1996 | 109.63 | 116.06 |
| 1997 | 113.95 | 123.86 |
| 1998 | 122.62 | 128.79 |
| 1999 | 141.79 | 135.76 |
| 2000 | 179.00 | 151.00 |
| 2001 | 226.66 | 163.85 |
| 2002 | 242.14 | 176.91 |
| 2003 | 257.05 | 184.55 |
| 2004 | 256.76 | 192.30 |
| 2005 | 245.43 | 202.08 |
| 2006 | 293.03 | 206.66 |
| 2007 | 331.08 | 233.42 |
| 2008 | 374.39 | 256.83 |
| 2009 | 527.08 | 307.94 |
| 2010 | 610.77 | 333.23 |
|
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