The chart is on a page discussing this:

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My workplace is NSF funded and supports a number of activities designed to increase interest in the discipline among young kids or improve teaching techniques for k-12 teachers. Similarly, we run an REU (Research Experiences for Undergraduates) program to give undergraduate students exposure to hands on research (and hopefully encourage them to stay in the discipline for graduate school).

A majority of our funding still goes to PhDs doing fundamental research, but the pipeline that feeds academic research begins with children, and research funding priorities aren’t blind to that.