Of course it was tracked, as were other violent crimes. The numbers they tracked showed the rate of rape in Worcester to be less than half the rate for the US. Those are the figures in the source you cited.
Wrong. The article says, “we found that the violent crime rate is one of the highest in the nation, across communities of all sizes (both large and small). Violent offenses tracked included forcible rape..”
First it says that the violent crime rate “is one of the highest in the nation.” Then it says that “violent offenses tracked included forcible rape.”
You need a class in remedial English.