|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 56.62 | 44.88 |
| 1987 | 78.74 | 40.58 |
| 1988 | 85.71 | 40.04 |
| 1989 | 75.70 | 39.00 |
| 1990 | 91.00 | 42.00 |
| 1991 | 91.61 | 43.87 |
| 1992 | 91.10 | 41.43 |
| 1993 | 93.13 | 42.77 |
| 1994 | 91.37 | 48.49 |
| 1995 | 97.08 | 48.55 |
| 1996 | 98.20 | 51.84 |
| 1997 | 92.12 | 51.32 |
| 1998 | 92.20 | 57.22 |
| 1999 | 93.59 | 65.24 |
| 2000 | 82.82 | 56.40 |
| 2001 | 84.20 | 55.40 |
| 2002 | 83.34 | 80.44 |
| 2003 | 87.66 | 55.49 |
| 2004 | 87.88 | 52.87 |
| 2005 | 89.79 | 60.25 |
| 2006 | 85.19 | 64.10 |
| 2007 | 78.64 | 60.47 |
| 2008 | 82.26 | 60.78 |
| 2009 | 82.74 | 69.61 |
| 2010 | 92.55 | 71.97 |
|
|
