Looking for DHIS2 older versions 2.14 to 2.18 war files

Dear all,

I am looking for older versions of DHIS2 war files fro 2.14 to 2.18, I would like to extract/retrieve data from previous backups archived in 2013. I am not sure which version was in use at my organization at that time. If there is any other way I could use to retrieve that data, please feel free to suggest.