|
| year | production | consumption |
| 1980 | 51.00 | 51.00 |
| 1981 | 64.00 | 64.00 |
| 1982 | 89.00 | 89.00 |
| 1983 | 105.60 | 105.60 |
| 1984 | 113.00 | 113.00 |
| 1985 | 135.00 | 135.00 |
| 1986 | 180.00 | 180.00 |
| 1987 | 226.70 | 226.70 |
| 1988 | 310.00 | 310.00 |
| 1989 | 315.19 | 315.19 |
| 1990 | 399.00 | 399.00 |
| 1991 | 449.00 | 449.00 |
| 1992 | 476.75 | 476.75 |
| 1993 | 531.84 | 531.84 |
| 1994 | 593.64 | 593.64 |
| 1995 | 627.55 | 627.55 |
| 1996 | 696.41 | 696.41 |
| 1997 | 716.89 | 716.89 |
| 1998 | 760.69 | 760.69 |
| 1999 | 752.21 | 752.21 |
| 2000 | 794.59 | 794.59 |
| 2001 | 851.09 | 851.09 |
| 2002 | 925.25 | 925.25 |
| 2003 | 964.10 | 964.10 |
| 2004 | 995.88 | 1,087.70 |
| 2005 | 1,055.92 | 1,269.22 |
| 2006 | 1,087.70 | 1,369.87 |
| 2007 | 1,108.19 | 1,460.63 |
| 2008 | 1,137.14 | 1,515.01 |
| 2009 | 1,436.97 | 1,882.64 |
| 2010 | 1,848.39 | 2,277.46 |
| 2011 | 1,681.70 | 2,260.51 |
|
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