Why rape cases are on the rise all over the world?

I highly doubt that rape cases are on the rise. In fact, the perception of this trend is due to widespread use of media which allows such news to be read by many people. In the past, there are also rape cases, just that we do not know of it because there is no means for us to do so. Now, the media is more prominent, not to mention the rise of Internet as a new tool for such news to reach global audience.