That's 12.9% less market share compared to just six years ago.
Note that they haven't asked about the OS in 2017 and that the numbers I've found here[0] for 2019 are a few % smaller than yours. I've also used "all respondents" instead of the professional ones because they didn't make the distinction until 2018, but quite frankly, that works in Microsoft's favor since professionals are relying on it even less.
Now expand that over the years and you'll get a clear downward trajectory:
That's 12.9% less market share compared to just six years ago.Note that they haven't asked about the OS in 2017 and that the numbers I've found here[0] for 2019 are a few % smaller than yours. I've also used "all respondents" instead of the professional ones because they didn't make the distinction until 2018, but quite frankly, that works in Microsoft's favor since professionals are relying on it even less.
[0] https://insights.stackoverflow.com/survey/2019/#technology-_...