74
Twenty-nine research teams analyzed the same data, and they all reached different results.
(fivethirtyeight.com)
https://fivethirtyeight.com/features/science-isnt-broken/
Another study with the same goal of comparing the results from different research teams found similar disparities, though the graphs aren't quite as pretty.
The chart sure makes it look like there was an overall consensus that refs are about 1.5x as likely, though.