There is nothing in this to suggest the kind of numbers you're throwing around.
"Of the 136 cases of sexual assault reported over the 10-year period, 8 (5.9%) are coded as false allegations. These results, taken in the context of an examination of previous research, indicate that the prevalence of false allegations is between 2% and 10%."
Last time I checked, 2-10% is significantly lower than 40%.