but this site:

states:
Field Name    BEATRICE   
1975 to 2001    20,372
2002                    357   
2003            270               
2004            212           
2005            185       
2006            106   
Cumulative total    21,502

but the main advantage of the platform is, that it has a powercable te back, and is therefore connected to the grid. This gives it the potential to act as as a relay, in case the whole field is to be build, and/or not enough wind is being produced, also "normal" platforms are energy independent, with their own power generation - will see if I can dig up some figures for that...