Visualization chart for four dimensional data

I am trying to find a way to visualize the data related to road accidents. The data has following dimensions:

Year Accident happened (Numeric) | Location of Accident (String) | Count of Accidents (Numeric) | Education Level of Driver (String)

I tried using the Google Bubblechart but that expects 3 numeric dimensions and the 4th dimension (can be number/string) is optional. Please suggest which visualization chart can be used for such data. Please note that I need to utilize any library that works on a web page (so not looking for Excel or such like option).