Good report and you must be driving on clean roads and in clean air as the Silicon figure is very low.
The only odd thing is that the Calcium figure seems low for a diesel oil, so I wonder what the VOA of this oil looks like in terms of detergent additives. Most car diesel UOA results show Ca of around 2500 mark.
Obviously the OCI can be extended if you wish and most of the VW owners in Germany would be doing at least 10K mile OCI's unless they spend a lot of time in traffic etc.
If you use Blackstones they have a very good data base of UOA results to give you some average figures to compare with. I was most impressed by them figuring out the diesel in my Volvo had the same block as a Renault Laguna that they had data for (Only petrol V40's were sold in the USA) and giving me those figures as a comparison.