http://www.destatis.de/presse/englisch/pm2005/p0890031.htm

Following these guidelines, probably closer to American guidelines, unemployment in Germany in January 2005 would have been around 9,4%, the employment/population ratio 67.5.

They´ve got a better (and newer ) overview on another page (in German) from January till June.

http://www.destatis.de/indicators/d/arb410ad.htm

2005  employed  unemployed  Labour force  empl./pop. r.
Jun      38,79        3,86           42,66           68,0  
May     38,74       4,06        42,80          67,9
Apr     38,65       4,33        42,98          67,8    
Mar     38,48       4,30        42,78          67,5    
Feb     38,37     4,44        42,81          67,5
Jan     38,33     4,01        42,34          67,4

Apologies for the view. :).