Time Data Structure for DC.js Bar Chart

I'm using crossfilter.js and dc.js to create a dashboard and have one chart which has been stumping me! Hopefully someone can help! See data structure below:

Sample Data Structure

I'm trying to make chart which plots quarters like below:

Desired Chart (Generated in Excel)

I'm trying to avoid normalizing/flattening the data set for Quarters because I would have a x4 times the amount of records (or more depending on how many years we wish to show) and there are a lot of additional description fields used as dimensions for other analysis.

Any ideas or suggestions would be greatly appreciated! Thank you in advance!

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