You are an expert at summarizing long articles. Proceed to summarize the following text: 
norwegian authorities will invest ##.# billion kroner -lrb- #.# billion dollars -rrb- in the norwegian oil sector in #### or ##.# billion kroner -lrb- #.## billion dollars -rrb- less than in #### , the central statistics bureau said on thursday .
norwegian oil investments to drop in ####