What are the observed ranges of values that define tercile groups?

For each indicator countries are divided into three groups of approximately equal sizes (terciles)—the top third, the middle third and the bottom third. See Technical note 7 at http://hdr.undp.org/sites/default/files/hdr2016_technical_notes.pdf for details about observed ranges of values and the number of countries in “tercile” groups for indicators in Sustainable development dashboard.