|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 26.11 | 19.19 |
| 1987 | 26.01 | 17.90 |
| 1988 | 25.60 | 17.85 |
| 1989 | 26.42 | 21.10 |
| 1990 | 29.32 | 23.80 |
| 1991 | 36.91 | 24.36 |
| 1992 | 38.34 | 23.99 |
| 1993 | 38.04 | 19.64 |
| 1994 | 20.45 | 20.45 |
| 1995 | 26.18 | 19.64 |
| 1996 | 15.99 | 15.99 |
| 1997 | 19.31 | 16.35 |
| 1998 | 16.04 | 17.35 |
| 1999 | 16.90 | 16.35 |
| 2000 | 19.02 | 15.96 |
| 2001 | 17.35 | 16.53 |
| 2002 | 20.29 | 15.51 |
| 2003 | 16.75 | 16.45 |
| 2004 | 18.01 | 46.77 |
| 2005 | 19.61 | 47.86 |
| 2006 | 16.39 | 52.46 |
| 2007 | 20.25 | 54.61 |
| 2008 | 25.51 | 57.66 |
| 2009 | 21.89 | 51.97 |
| 2010 | 17.02 | 45.16 |
|
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