Based on the diversity numbers reported by Google[[1] in 2018, 59.7% of leaders hired in 2018 were White. This number was 63% in 2017, 65% in 2016, 69% in 2015 and 68% in 2014 (I only found numbers only from last 5 years)

Overall workforce representation numbers tell us that Google's leadership team in 2019 is 66% White so I am not sure if what you are claiming is right.

[1]: https://diversity.google/annual-report/

That link you posted shows the percentage change of certain groups in tech hires, but conveniently leaves out the overall percentage breakdown for all tech hires, which is the real issue. I invite you to walk into the engineering department of any major tech firm in SV and tell me it’s not majority Indian engineers.

What would be really helpful is a study that shows the breakdown of Google engineers in different locales. So far, I haven’t seen any of these come out of these diversity reports that SV companies really love to show off these days.