Leukemia is a serious illness that is in the top ten of cancer-related deaths in the United States. It is worth noting that successful treatment rates have increased four-fold since the 1960s. At the beginning of that decade, only 14 percent of people survived for five years after diagnosis. By 2005, that percentage had increased to 54 percent. Nevertheless, in 2009 leukemia claimed the lives of over 21,000 people, with the highest number of deaths among males with chronic lymphoblastic leukemia.