Data provided by czech police can be downloaded at: https://www.policie.cz/clanek/statistika-nehodovosti-900835.aspx?q=Y2hudW09Mg%3d%3d
the decode key for python: explanations.py can be found over here: https://courses.fit.cvut.cz/MI-PYT/_tasks/pandas/explanations.py

There is one row ignored in the pedestrians table, there was only one instance, where there were two pedestrians in an accident in 2018
This should not skew results that much but it will simplify the data processing