According to the below link, hoteliers in Ibiza have reportedly attempted to extinguish British travel warnings on the risk of sexual assault in Spain:
COMMENT: Having edited STAYING SAFE ABROAD since 2009, I can firmly attest to the fact that sexual crimes in all their forms are predominant in southern Europe simply based on the number of rape-related incidents in my Spain database.
Ibiza is an island in the Mediterranean Sea, 79 kilometers (49 miles) off the coast of the city of Valencia, in eastern Spain. It is the third largest of the Balearic Islands. While it is one-sixth the size of nearby Majorca, Ibiza is over five times the size of Mykonas (Greece) and ten times the size of Manhattan Island. It is well known for its summer club scene which attracts very large numbers of tourists, though the island's government and the Spanish Tourist Office have controversially been working to promote more family-oriented tourism.
Also, please see the below link, dated June 2013:
British consular director for Spain, Will Middleton, reports in THE OLIVE PRESS that 110 Britons sexual assaults, which in a two-year period, seems to be a reasonable number.