About retention results of 307
45:50 34:40 13:54 14:38 18:53 18:05 14:41 11:07 12:44 18:01 21:08 17:40 19:35 43:43 56:31 19:01 27:00 21:46 18:48 53:41 15:21 22:02 18:10 33:40 24:38 24:58 24:23 26:26 24:36 30:27 22:19 87:10 48:21 64:58 76:34 28:16 36:27 57:15 28:13 38:38 33:29 32:48 32:39 34:56 37:01 63:49