Is there a method to extract uptime % from statuspage.io using the API?

Solution for Is there a method to extract uptime % from statuspage.io using the API?
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I’ve success in using the API to extra all sorts of information from statuspage.io using their API. However, I can’t seem to get to uptime percentage that they display in the web version, when looking at historical (previous months).

Is this information handily available somewhere or do I download every incident and calculate it?