If you take away 37% of the supply of electricity, it will need to be replaced. This means that alternatives to coal will go up in price, and your electricity costs will go up with them.
Or maybe not. The german EEG, which is so successful that it has been copied by over 65 countries has brought so much alternative energy online that the nuclear and fossile fuel lobbyists have succeeded in convincing the current government to break its promises and cut it short ahead of time, because they were afraid the they would be driven out of business by renewable energy.
Those 37% would be replaced, and chances are the replacement would be as or even cheaper. Of course, consumer prices for electricity would still rise, after a media campaign blaming the environmentalists, but that's got nothing to do with real energy prices. If you want to know what energy costs, never look to the consumer price. That price is "what we can take and get away with" and not "what it costs". If you want to know what energy costs, look to the exchanges where the industry prices are set.
You'll be surprised. Those prices have been dropping, sometimes at the same time as consumer prices have been increased.