|
| year | production | consumption |
| 1984 | | |
| 1985 | | |
| 1986 | 91.80 | 44.68 |
| 1987 | 94.75 | 57.41 |
| 1988 | 106.17 | 56.77 |
| 1989 | 97.91 | 53.17 |
| 1990 | 98.23 | 62.90 |
| 1991 | 81.66 | 40.95 |
| 1992 | 94.52 | 42.37 |
| 1993 | 97.28 | 64.98 |
| 1994 | 97.25 | 72.43 |
| 1995 | 94.19 | 74.24 |
| 1996 | 97.01 | 78.08 |
| 1997 | 100.82 | 78.65 |
| 1998 | 98.90 | 78.46 |
| 1999 | 98.12 | 80.77 |
| 2000 | 97.86 | 80.54 |
| 2001 | 103.13 | 84.90 |
| 2002 | 112.15 | 92.28 |
| 2003 | 90.53 | 92.80 |
| 2004 | 85.85 | 78.04 |
| 2005 | 88.01 | 88.01 |
| 2006 | 82.18 | 84.86 |
| 2007 | 78.08 | 105.94 |
| 2008 | 90.34 | 126.19 |
| 2009 | 78.07 | 114.38 |
| 2010 | 91.50 | 103.48 |
|
|
