Ragnarök Question Series: if catastrophe caused by some "other risk" occurs, will it reduce the human population by 95% or more?

The Ragnarök Question Series series features questions about the following risks, of which a majority are mostly anthropogenic (i.e. created by humans):

• Natural pandemics
• Artificial Intelligence
• Synthetic biology
• Nanotechnology
• Climate change and geoengineering
• Nuclear war

This notably omits risks that have been discussed in the relevant literature, such as non-anthropogenic risks (such as supervolcanoes, solar flares, asteriod impacts) as well as various anthropogenic ones (such as chemical warfare, conventional warfare, civilizational collapse, amongst others).

In the first part of the Ragnarök Question Series, we asked the question If a global catastrophe occurs, will it be due to "other risk"? Now it is asked,