OP
I think the op is referring to a chart in beckett that actually exists, whether it is accurate or not is not the question he is asking.
It goes something like this
1950s p-gd 5-15% vg-15-30% ex 30-50% exmt 60%-80% nm100%
1960s-80s p-gd 5-10% vg-10-20% ex 20-40% exmt 40-60% nm 80%
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