There were a number of articles about that issue several months ago. Google cites privacy concerns, which is BS. They simply do not want site owners to know which search phrases people are using to find web sites. It's all part of their vendetta to emasculate SEO.
Google Has Gone 'Dark': The Search Giant Just Ended Free Data And People Are Freaking Out - Business Insider
They are also super personalizing search results. Three or four people performing the same search on different PCs are now frequently seeing sometimes radically different results.
Big Brother is watching. Resistance is futile. You will be assimilated.
DuckDuckGo.com is looking better and better.