The figures on women killed by their male partners comes from the Home Office and is based on actual figures for homicides in England and Wales.
Unfortunately the link from the Home Office website on on this page doesn't seem to be working so I can't tell you the exact page of the 2012 report where the data is contained, but it's in there.
What is interesting is that the media reporting of crime has no correlation with the actual incidence of crime. For example, if you go by reports in the popular press, you'd think that older people are most at risk of violent crime or robbery when they are amongst the least at risk. This is because papers know that stories about vulnerable elderly people being assaulted or burgled will pull the heart strings, sell papers and advertising. Those at greatest risk of assault or robbery are actually young men who are targeted by other young men. But, there is less sympathy for this kind of victim, so you don't get many reports about such assaults, unless there are particular circumstances likely to gain sympathy for the victim.
Same goes for reports of violence against women. Statistically, false accusations of rape are very small, but at least once a week a paper like the Daily Mail will have an article featuring a "false claim of rape." We know at the same time there will have been far more convictions, but these aren't interesting enough to report unless they are pretty extraordinary. This gives the false impression that lots of women lie about rape and very few men actually rape.
Similarly, the media use the most coy language when describing those all too frequent cases where men do kill their partners, often with their children and sometimes then kill themselves. Usually first reports go something like, "Two adults and two children were found dead in their Acacia Avenue Home yesterday. No one is being sought in connection with the crime." It's SO bland that you almost don't think of what is involved. When the names and circumstances then come out, articles tend to be peppered with testimonials from shocked neighbours who thought they were "just a normal family," and especially those saying what a loving devoted father the killer was, how they can't understand what would have "made him" do it. And, more often than not, there are suggestions if not allegations that the dead wife was somehow to blame. She'd left him. She was going to leave him. He thought she was going to leave him. He thought she was having an affair. She was having an affair. Dead women tell no tales so can't defend themselves against allegations that it was THEIR wrong doing that "drove" their partners to kill them and their children.
This, too, gives the impression that men are perhaps justified in killing partners and children.
All this creates a kind of atmosphere that seeps in to our minds, telling us repeatedly that women are bad/wrong/evil/vengeful and that men good/caring/sensible, and if they do something wrong, it's rare and really not their fault.
So, as others have said, we come to accept language and assumptions about women being bad/wrong/evil as just fairly normal. But, we feel shocked or even get defensive when the same descriptions are applied to men, particularly in relation to their abuse and control of women. We can't wrap our heads around it, it just sounds so extreme and implausible (although in reality, it's not,) so the response can be to point the finger at those who use such descriptions and insist they are men-haters and misandrists. That's because we're all conditioned to a degree to believe that they are. We're all being duped (including those men who believe they have to live up to the stereotype model of controlling, aggressive, anything-that's-not-feminine masculinity when it's not really who they are.)