Map of sex crimes reported to Lawrence Police in 2011. Blue dots indicate rapes and the red dots indicate other sex crimes. Locations are approximate block locations and do not reflect a specific address. 21 of the crimes reported either did not have locations, or revealing those locations could have possibly identified the victim. To view a scrollable version of this map, visit http://bit.ly/yy7HyI

There were 40 reported rapes last year in Lawrence, equal to the number reported in 2010 and down from 57 in 2009. In total, 121 sex crimes were reported to Lawrence police, including 47 sex crimes against children, according to information obtained through an open records request.

Here’s a breakdown of sex crimes reported in 2011:

• Indecent liberties with a child: 34.
• Solicitation of a child: 4.
• Sexual exploitation of a child: 9.
• Sexual battery: 18.
• Unlawful sexual relations: 8.
• Criminal sodomy: 8.

The true number of sex crimes committed is difficult to gauge, as sex crimes are high on the list of under-reported crimes, said Richard Felson, a sociologist at Pennsylvania State University and co-author of a 2005 study on the topic.

Felson said sex crimes are less reported than physical assault but probably more often reported than petty property crimes.

On the Kansas University campus, sex crimes reported to the KU Public Safety are rare. Between 2008 and 2011, six rapes and seven other sexual assaults were reported to campus police, including two sexual batteries in 2011. Click here for a look at a Lawrence sex crime map.