The FBI publishes a good amount of information about violent crime rates amongst the population. Because the rates are calculated per 100,000 people, it's a good measurement of crime rates that controls for increase in crime rates due to population increases. They break the crimes down by type, so there are statistics for things like murder/attempted murder/assault/forcible rape/etc. The overall rate of violent crime per 100,000 people is falling, and in the cases of things like robbery and assault you can see how the percentages keep up with the overall declining rate of violent crime over the past 5, 10, 15 years. The rate of reported rapes has gone down alongside the crime rate in general, but it is falling more slowly. So those are just the numbers. For extra fun, you can throw into the mix that 1. rapes are thought to be underreported, and 2. these tables rely on self-reporting from law enforcement agencies so if a man was raped and then sent out of the precinct by a disbelieving officer without filing a report (just as an example) then something like that won't be included in these statistics. Furthermore, the population is estimated based on information from the Census Bureau, so all of the uncertainty of the Census Bureau with regard to population size is imported into the FBI tables. (Data.
As far as education goes, it's difficult to pinpoint who got what education since it's often state-controlled, or school-controlled, or people take 'protect yourself' self-defense classes at community centers, etc. But the CDC's rape prevention grant/education program appears to have gotten off the ground circa 2004. In this handy little fact sheet
about the Rape Prevention and Education Program (RPE), they estimate that their message reached something like 15 million Americans through schools and outreach and whatnot in 2008-2009. According to the FBI, there was indeed a drop of about 3 points between 2008 and 2011.
Which is awesome, right? Wellll, not if you look at the implementation.
Texas opened up a couple crisis centers. New Jersey's doing a study. Minnesota had a glorified PTA meeting. Iowa has a couple teams plugging away at it. New York - specifically NYC, is approaching it via the social norms route, which is interesting. And the most involved state, California, makes no mention of educating girls on how not to get raped; California appears to be approaching its young men and encouraging them not to rape.
For kicks, looking at the previous four-year rates on the FBI table, we find that '04-'07 is -1.8, and '00-'03 is +0.4. Did rape victims suddenly decide to start wearing burquas and carrying mace everywhere in 2008? Did college kids suddenly stop partying so much in 2008? Maybe women everywhere woke up and started locking their doors.