CHARLESTON, W.Va. -- Wal-Mart remains West Virginia's largest private employer, as the discount store chain has every year since 1988, according to data compiled by WorkForce West Virginia and released Tuesday.Joining Wal-Mart in the top five employers are West Virginia United Health System, Charleston Area Medical Center, Kroger and Consolidation Coal Co. Those five companies were also the state's top private employers last year.The list includes businesses with single and multiple locations. Companies are ranked by number of employees. The data used for the list comes from the Quarterly Contribution Report for the first quarter of each year.The remaining top 10 private employers shifted. Mylan Pharmaceuticals and Lowe's swapped positions from last year and now rank sixth and seventh respectively.St. Mary's Medical Center and Mentor Management also changed positions. St. Mary's is the eighth-largest state employer, while Mentor now ranks ninth. ResCare moved two spots forward, breaking into the top 10 employers this year.American Electric Power fell out of the top 10 employers list. The utility fell to 13th, behind Wheeling Hospital and Cabell Huntington Hospital.The top 20 employers in March 2013 employed 1,683 more employees than the top 20 employers of 2012, according to WorkForce West Virginia.The list was prepared with information provided by employers covered under the unemployment compensation insurance system, through the federal and state Quarterly Census of Employment and Wages Program conducted in West Virginia by the Bureau of Labor Statistics, U.S. Department of Labor and the Research, Information and Analysis Division of WorkForce West Virginia.Find the entire list of West Virginia's top 100 employers at http://workforcewv.org/lmi/EandWAnnual/Top100Employers.html.Reach Caitlin Cook at email@example.com or 304-348-5113.