Kansas experienced an outward migration net loss of 12,557 people in 2012-2013, up from just under 6,000 the previous year. Despite this increase, the state’s relatively high birth rate combined with foreign immigration to keep the overall population growth rate positive. According to the Kansas City Star, Sedgwick County (Wichita) alone had 25,480 births (and 13,226 deaths) during 2012-2013, counterbalancing those lost to outward domestic migration.
2012-2013 state-to-state net domestic migration: -12,557
The Kansas Turnpike, via Wikimedia