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The problem I believe is that the “count.b” variable must be an array of records over time. That is, something like this:
var count = {
B: [1,2,3,4,5,6,7,8,9,10,11,12],
S: [1,2,3,4,5,6,7,8,9,10,11,12]
};
If you have only a fixed number it understands that it is referring to the first month.
Source:stackexchange.com