Doesn't really tell us much more than we already know.
Known sales PS3 at 74.1m
Known sales PS2 at 155.1m
Unknown sales PS2+ PS3 at 16.5m.
If you estimate PS2 at 156.5m or 157.5m, then that means PS3 sold >89.2m or >88.2m as of March 31 2015. However the PS3 didn't end shipments until October 2016 for USA and ~May 2017 for Japan.
So either the PS2 sold ~160m or the PS3 sold quite a bit more than we think.