Tom, graphics tip:
Make it a pyramid up instead of a slope down. So a base at 0, the 1s on top, the 2s, etc. Like classic population demography charts.
Also, as a stats nerd, what I see in this graph is that BM isn't struggling to retain new players that much: if we get'em, they stay for a year. Where we're struggling is the 1-2 year range. We get people for a year, then they drop out. That's NOT the story we've been getting from talking on the forum, asking peoples' perceptions, etc.
Alternatively, maybe the 2-years-ago group was outrageously big, or maybe the current year group is abnormally small.
