How do I link marker-width in Torque Cat to values in the table?

[المشرف العام]

I have school enrollment data for 10 consecutive years, and I want the school points to grow or shrink based on enrollment. I've tried this two ways, using the enrollment column and creating a new column called "marker_width." See below:



etc. etc.

I've fiddled with this for a long time, but nothing seems to work.



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