|
| year | production | consumption |
| 1984 | 81.61 | 79.27 |
| 1985 | 82.85 | 79.85 |
| 1986 | 73.95 | 82.37 |
| 1987 | 80.49 | 86.95 |
| 1988 | 76.41 | 85.59 |
| 1989 | 64.28 | 84.27 |
| 1990 | 74.52 | 85.75 |
| 1991 | 82.80 | 82.96 |
| 1992 | 82.32 | 82.04 |
| 1993 | 79.30 | 79.17 |
| 1994 | 93.93 | 82.33 |
| 1995 | 95.08 | 80.73 |
| 1996 | 94.96 | 81.71 |
| 1997 | 89.46 | 82.45 |
| 1998 | 109.08 | 83.90 |
| 1999 | 101.50 | 85.35 |
| 2000 | 107.67 | 81.69 |
| 2001 | 103.40 | 83.92 |
| 2002 | 105.79 | 85.41 |
| 2003 | 108.98 | 91.12 |
| 2004 | 109.60 | 88.32 |
| 2005 | 105.73 | 86.33 |
| 2006 | 117.79 | 86.66 |
| 2007 | 124.82 | 85.84 |
| 2008 | 139.52 | 86.52 |
| 2009 | 140.80 | 83.68 |
| 2010 | 135.73 | 88.99 |
|
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