All that proves is some parts of the US are more densely populated than others. Wyoming only has 6 people per square mile.

Also you need to understand what those "missing" number mean. The vast, vast majority of those reports are kids who are found within hours.

http://www.pollyklaas.org/about/national-child-kidnapping.html?referrer=https://www.google.com/ National Child Kidnapping Facts 99.8% of the children who go missing do come home. Nearly 90% of missing children have simply misunderstood directions or miscommunicated their plans, are lost, or have run away. 9% are kidnapped by a family member in a custody dispute. 3% are abducted by non-family members, usually during the commission of a crime such as robbery or sexual assault. The kidnapper is often someone the child knows. Only about 100 children (a fraction of 1%) are kidnapped each year in the stereotypical stranger abductions you hear about in the news. About half of these 100 children come home.