0.0, 52.1212839519, 6.40719759732, 43.0378290605, 86.769620064, 96.7032941473
53.7416111725, 0.0, 27.5552964592, 85.3286070586, 59.5613449796, 8.89540736892
How to speed up the code - searching through a dataframe takes hours