In the US, it's 20%. We have more nuclear power plants than any other nation in the world.
It takes years, and an enormous amount of money, to fully decommission a nuclear plant.
Do you know what the cost would be to not just get rid of them, but to replace them with enough geothermal plants, wind farms, coal burners, etc. to make up for the 20% of electricity?
Trillions. Money that doesn't exist, even if we did have enough get-up-and-go to massively restructure the power industry.
It's not going to happen anytime soon.
PS: Asia, as a whole, has plans to build up to 100 new plants over the next few decades.
PPS: I don't think SolarEnergyBob has the same ring to it as AtomicBob?