I don’t think anyone knows or can predict actual numbers. The topic and tragically, the science, has been hopelessly politicized by those who seek to control us.
I have never been worried about it after I woke up to the hypocrisy of it all in the early 90’s. My house is 70 degrees. My car when I travel is 70 degrees. My office is 70 degrees. When I am outside I have effective clothing for both cold and warm conditions.
There are millions of acres of potential farmland that are too cold to use under present climate conditions (i.e. - Canada, Greenland, Siberia, etc). Modern agriculture can feed the world with a mere fraction of the land of the U.S. That is a fact.
Humanity will likely not notice a change of a few degrees one way or another in the next hundred years and flip a coin as to warmer or colder - we simply do not know nor should we really be concerned about it.
There has never been a time in human history, thanks to energy, technology, and global commerce where we have been more capable of dealing with “climate change” of any kind as citizens of Earth. All the hysteria is just that, hysteria. I am 100% confident that we will be fine.
The greatest threat to humanity is not my SUV, it is those in charge of humanity just as it has been throughout human history.
Basically, the growing season is what I was more concerned about...