Big Bang Theory Relationship Diagram Update…

Two years ago I did a relationship diagram based on data collected from The Big Bang Theory TV-Series. Meisterluk updated his data for the seasons 5 and 6.
Obviously I had to update my diagram, which I finally had time to do. Here it is:

It is only based on the data regarding dating and sex. The little mistakes I found in Meisterluk’s data i corrected again and am mirroring the corrected data here.

What did I change for the new version 1.4, since the last version 1.3 from 2011? I moved the names into the circles to keep it more compact. I changed the position of the timeline and moved some characters around for readability.
The basic concept is the same as in v 1.3. Characters that share the same length and color line on the radial timeline in the same radial distance have a relationship (date/sex). That’s it.
One can clearly see that Leonard and Penny have an on-and-off relationship. Which they finally pick up again in season 5. Sheldon and Amy, and Howard and Bernadette have the two stable relationships in the group. Their relationships go on for almost 3 seasons now.
Raj seems almost asexual if one compares his timeline. He has only one sexual encounter per season. I did not count the ‘dating’ Raj did with Siri as it is a computer voice. At the end of season 6 Raj finally picks up a relationship with Lucy. Let’s see where this ends in season 7.