The following two tables show the percentage of ash , powder and dross : : year zinc -ton ash-ton powder-ton dross -ton zinc on product total zn total zn total zn 2001 919.581 275 192.5 110 104.5 75.295 65.50665 557.07435 2002 751.028 229.92 160.944 97.269 92.406 64.484 56.10108 441.57737 2003 719 201 140.7 86.3 81.985 70.5 61.335 434.98 2004 1248.851 342.82 239.974 148.8 141.36 71.802 62.46774 805.04926 ...
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