In reading the descriptions of each metric, I am not sure they are showing what they say.
- Conversion Rate: The percentage of searches that resulted in at least one click.
- Click-through Rate: The average number of search result clicks per search query.
What is currently Conversation rate would usually be the click through rate. i.e. a search occurs and a click follows from those results. i.e. a click through.

What you have as click through rate - average number, is presented as a percentage.??
A missing Metric would be CLICK RANK. Where in the list the result clicked sits.