Women’s Center: Most Sexual Assaults In San Joaquin County Go UnreportedApril 4, 2016 | Rich IbarraIn San Joaquin County the number of official sexual assault cases has ranged from 135 to 175 per year over the last couple years. But last year the Women’s Center received calls from about 1300 sexual assault victims. Listen /Update RequiredTo play audio, update browser or Flash plugin.