how do I see the locations of the photos in year?

When I go to the year in collections, I have 2014 and 2015. Beside 2014, it lists locations of where those photos of that year were taken. But it does not show me the locations of the photos in 2015. I already checked to see that my locations setting was on but for some reason the location only shows for 2014 but not 2015 photos.