I could share data from Leaf Spy that I recorded while driving my 2011 and 2015, but the data is old. I am also very concerned about conclusions/observations you will make based upon the data you will receive by asking drivers for dashboard information. I know how much the estimated range number varies (although the 2011 was somewhat accurate after the last software update). As others already noted, the 2011 and 2012 models did not have percentage display for state of charge (and the 12 bar graphical display of charge level accuracy changed when software was updated two or three times). I found the estimated range number to be quite optimistic on the 2015 at full charge (was disappointed that it was not as accurate as the 2011). The 2019 is also very optimistic at full charge and gets somewhat more accurate by the time the battery is down to 50% SOC.