Interactive dashboards

Dashboards are great, interactive dashboards are even better. Find here a dashboard made for tracking a website's activity. It consists of (A) average page visit length segmented by age, (B) the number of visits today, (C) the monthly active users over time, and (D) the source of traffic segmented by month.

If you hover over or tap certain elements of the bar and line graphs, you'll see some interactivity that shows more detail about the selected data. You can always reset any plot to its original state by double-clicking it.

Using this interactivity, how much website traffic in March was from search engines?