A 1996 interview survey of 711 women reported that forgetting and later remembering childhood sexual abuse is not uncommon; more than a quarter of the respondents who reported abuse also reported forgetting the abuse for some period of time and then recalling it on their own. Of those who reported abuse, less than 2% reported that the recall of the abuse was assisted by a therapist or other professional. Williams demonstrated that a minority of adults failed to disclose documented childhood emergency room visits related to sexual abuse. As well as demonstrating that some people may forget abuse, the data trend indicates that as the amount of force used in the abuse increases, recall also increases.