How I can export analytic data from iTunes Connect
Navigate to Analytics for the appropriate app, then select the Metrics tab, then select a metric. There is a download icon (the box with the down arrow in the screenshot below) which you can click on for a CSV file. You can also select an option from the View By dropdown. As far as I know, there is no download all stats functionality sadly. Also, the analytics functionality is available for the iTunes Connect Admin, Finance, and Sales roles.