Views Aggregation- sum function does not work when year filter added D7

Hello, I have field named “days away from work” that I would like to sum by year then chart. Everything is cool until I add a filter by year, the values display individually- not summed. I viewed this   https://www.drupal.org/docs/7/theming/howto/create-a-views-event-list-gr… but still stuck.

Help appreciated!

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