So roughly 0.017% of the population.

"Spicy tweets" including:

sending false communications

sending threatening communications

sending or showing flashing images electronically to people with epilepsy intending to cause them harm (‘epilepsy trolling’)

encouraging or assisting serious self-harm

sending a photograph or film of a person’s genitals (‘cyberflashing’)

sharing or threatening to share intimate photographs or film

That is not a true statement.

Here's a good break down and explanation of what that number actually means - https://www.youtube.com/watch?v=tB3WVygAM8I

That link says “12k arrests”, not thrown to prison! It’s also not clear how reliable that data is