Mart, 131 S. Ct. at 2560-62. But standing alone, "anecdotal evidence . . . [will] rarely, if ever, . . . show a systemic pattern of discrimination." O'Donnell Constr. Co. v. Dist. of Columbia, 963 F.2d 420, 427, 295 U.S. App. D.C. 317 (D.C. Cir. 1992); accord Briggs v. Anderson, 796 F.2d 1009, 1019 (8th Cir. 1986