According to a report at SER, 99% of Google page 1 SERPs contain at least one HTTPS result. I haven't see quite that many, but, I have seen a lot more HTTPS than previously. Also, the SERPs for certain searches show more HTTPs than others, so it does depend upon what your searching for.

https://www.seroundtable.com/https-on-the-rise-google-24196.html