I don't know about these numbers. What I can tell you is that the business exodus from CA is very real. This means less jobs, or, what could be worse, lower paying jobs. I know of entire companies who picked-up and left for places like Arizona and Texas.
I personally cannot wait to be able to do the same. I want nothing whatsoever to do with California in terms of business. After decades of living here I am just sick of it. I can't make the move yet due to deep family ties that we must respect and be considerate of. My mother just passed two weeks ago. My father is in OK health but he is up there in years. Etc. As some of these ties dissolve it will be far easier to make the decision.
And BTW, this isn't about Democrat vs. Republican states. In fact, one of my potential targets is Massachusetts. CA has simply gone looney. I can't even begin to make a list of the nonsense people and businesses living here have to put up with.
I'll give you a few (of likely hundreds):
They passed a tax added to your property taxes that is a function of any surface area on your property that does not allow rain to come into contact with dirt. So, yes, your driveway, patio, pergola, etc. All of it results in an additional tax assessment. For businesses, this means the entire parking lot is now a tax liability. Installed solar panels on a structure over some dirt? You just incurred an additional tax on your installation.
I am currently helping a friend figure out the technical aspects of a business he wants to start. His initial target was Los Angeles. This business would likely bring dozens, if not well over a hundred jobs to wherever it might be located. We met with the building permit folks for LA County. They pretty much told us no less than three years for all the permits to be issued. He is now talking to people in Arizona, Nevada and Texas. He is also moving his existing company (~100 jobs) to wherever the new business will take root.
And then there's the hundred billion dollar high speed train to nowhere that isn't even a high speed train and (if I remember correctly) might not even have ten miles of track built.
The governor signed an executive order asking for 15% water conservation. At the same time we have no problem growing almonds here and providing this high-water-demand crop with all the water farmers need.
Oh, and have you heard of the County of Los Angeles Business Property Tax? No, not what you might think. You have desks? Copiers? Chairs? Curtains? Equipment? Shelving? Yes? Anything inside the building you own or lease for your business is considered "business property" by the County of Los Angeles. And, as such, you are required to pay a tax to the county. Yes, a tax, permanently, every single year, on your chairs, desks, computers, coffee machine, etc. In fact, they call it a "privilege tax" for the privilege of doing business in or THROUGH the county. Yes, that's correct, if your business isn't in LA County but you do business in or DRIVE THROUGH the county, you are required to pay this tax. For companies with lots of equipment (like manufacturers) this could easily amount to $50K to $100K per year. In other words, a few jobs.
There's a lot more. I'll stop there before my blood pressure goes through the roof.