Data on the Cost of Axes in Variable Fonts

At a previous call I mentioned we had some data on the cost of removing
variable axes from multi axis vf. Here it is:

https://docs.google.com/spreadsheets/d/1WA5F9GBTqtIWCy1zo1xHz87_ohUWbxvJwDXcSuaLb_A/edit#gid=195687802

This is from the early days of VF's so it only covers a small number of
families. I'd like to rerun this against a larger sample of families now
that there are more available.