Directly below the Xaxis aggregation, as shown in the screenshot below, there is an “Advanced” option (red frame 1), where you can find the “JSON input” field (red box 2). 
In the "JSON input" input field, you can add the following script and achieve separation of the values displayed on the X axis.
{"script":"(_value)/100"}
A more detailed explanation of this can be found on the elasticsearch official blog: https://www.elastic.co/blog/kibana-4-beta-2-get-now/
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