CENTR or the Council of European National Top level domain Registries put out a report which you can read here
From the report is the chart below which shows the growth rates and stats for European ccTLDs.
Portugal and their .pt extension had the highest 12 month net growth rate at 27 %.
The average renewal rate amongEuropean ccTLDs stands at 79% as recording in early 2013. Over the different zone sizes, this of course varies as seen to the left. Generally speaking Registries with larger domains under management have a lower renewal rate