Percentage of respondents that knew about each feature?

This may just be me missing something, but looking at the [CSS feature results from 2021](https://2020.stateofcss.com/en-US/features/) I cannot tell what percentage of respondents *knew* about each feature. My understanding is that the circles are showing essentially this percentage:

````
People using the feature
----------------------------------------------------------------
(People using the feature + People that knew about the feature)
````

The overlay provides more data, but still about usage:

What I was interested in was this percentage:

````
People that knew about the feature + People using the feature
----------------------------------------------------------------
Total respondents
````

Is this shown anywhere?

Also, the percentage of total respondents that use the feature would IMO be more useful than the percentage of people who use it over the percentage of people who know about it. If a feature is known by 1% of developers but almost everyone who knows about it uses it that gives us a huge usage percentage which does not actually reflect how widely the feature is used at all.