Ah, is that over the life-time of my being on HN? I've lived in 3 different timezones, US East, US West, East Australia, as well as spending a few months in Europe.
So, though it looks like I'm spending time on HN all through the day, this is not actually reflective of my behavior without taking that into consideration :)
Hope you didn't spend too much time on that, it's cool to see. Thanks.