Muslim sexual harassment of German women

The latest number I have of German women complaining that they were sexually assaulted by Muslim "refugees" on New Year's Eve, is 150, with two claiming rape. [Later, 14 Jan: now it's over 500!]
Meanwhile the police and Merkel's administration show more concern for the Muslims ("backlash"!) than for the victims.
There's now an official Cologne "code of conduct for women".  What about the code of conduct for the rapists: stop raping?  Or a code of conduct for the police: catch the rapists?