example 1 :
percentage Dont now
X1 20 -9
X2 50 -9
X3 - -9
Total 70
If X3 does not know ' Total can be 100 different, go to next variable
example 2:
percentage Dont now
X1 20 -9
X2 50 -9
X3 30 -9
Total 100
I don't know in any of them otherwise there should be 100 total,go to next variable