The earliest study in the Western World attempting to survey marital rape was an unpublished study by Joan Seites in the spring of 1975. Seites sent questionnaires to 40 rape-crisis centers from a list compiled by the Center for Women Policy Studies (Washington, DC). 16 Centers completed questionnaire for a response rate of 40%. Of the 3,709 reported calls dealing with rape and attempted rape received by the 16 centers, 12 calls dealt with marital rape (0.3%). Because rape-crisis centers did not always record the relationships of the callers, whether the 12 reported calls fully represent the number of married relationships cannot be certainly known.