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Grade 4 – 0.46% to 1.01%
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2002 Exp=1.01%; 2002 Nar.=0.94%
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2007: Exp=0.91%; Nar.=0.49%
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Grade 8 – 0.22% to 54%
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2004 Exp=0.52%; 2002 Per=0.54%
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2007: Exp=0.54%; Per=0.46%
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Grade 10 – 0.16% to 0.80%
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2005 Exp=0.53%; 2000 Per=0.56%
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2007: Exp=0.80%; Per=0.77%
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