Redmine

A little tip for those interested. Developers have access to the API which allows them to work with data in lots of different ways through the API:
http://www.redmine.org/projects/redmine/wiki/Rest_api

However it takes a bit of effort to work with JSON / XML if you are not used to it. Another way to extract the data is to just use the URLs to retrieve the JSON then convert the JSON to CSV using https://json-csv.com. Then you will be able to open this data inside a spreadsheet.