The politicians absolutely won't care. If it goes up, they will claim it is the reason they need more gun restrictions. If it goes down, they will claim it is reason they need more gun restrictions.
In addition, if rape does up, they won't count it as gun violence. It is their view that being raped is just part of being a woman and even have been running editorials saying exactly that - featuring a woman bragging that while she was raped or assaulted 5 times before becoming a gun owner - and then not harmed the next 9 years - she is giving up her guns because being raped and assaulted is part of being a woman and she accepts that role.