[["", "shares", "weighted averagegrant-datefair value"], ["non-vested at may 31 2011", "869", "$ 40"], ["granted", "472", "48"], ["vested", "-321 ( 321 )", "40"], ["forfeited", "-79 ( 79 )", "43"], ["non-vested at may 31 2012", "941", "44"], ["granted", "561", "44"], ["vested", "-315 ( 315 )", "43"], ["forfeited", "-91 ( 91 )", "44"], ["non-vested at may 31 2013", "1096", "$ 44"]]