BERLIN — Germany’s box office revenue slumped 12.2% in the first half of the year to 399 million euros ($452 million) despite local megahit “Good Bye, Lenin!,” which netted $40 million.The Wolfgang Becker pic was followed by “The Matrix Reloaded,” with $32.4 million, and “The Lord of the Rings: The Two Towers,” with $31 million, according to the latest figures from B.O. tracker Nielsen EDI. Some 67.5 million tickets were sold in the period, a 10.9% drop in the number of moviegoers. Local exhibs have blamed the recession and economic worries for dwindling box office earnings. U.S. productions dominated Teutonic theaters with a 75.2% market share while German pics accounted for 14.3%.