Closing Market Price and NAV History

Date	Market Price1	Net Asset Value2	Bid/Ask Midpoint	Volume1	Net Assets2
6/29/2018	$140.01	$140.05	$140.05	65,644	$1,617,562,582
6/28/2018	$137.41	$137.40	$137.60	69,869	$1,586,912,728
6/27/2018	$136.68	$136.64	$136.64	78,952	$1,578,183,381
6/26/2018	$140.63	$140.60	$140.43	30,477	$1,616,906,176
6/25/2018	$141.29	$141.20	$141.30	72,223	$1,623,798,871
6/22/2018	$145.28	$145.18	$145.17	51,124	$1,669,569,340
6/21/2018	$145.29	$145.15	$145.19	84,938	$1,669,219,935
6/20/2018	$148.00	$147.92	$147.88	49,061	$1,693,707,635
6/19/2018	$145.49	$145.47	$145.46	82,266	$1,658,381,784
6/18/2018	$144.00	$143.90	$143.91	93,602	$1,626,109,975
6/15/2018	$145.50	$145.44	$145.44	33,949	$1,643,448,411
6/14/2018	$145.07	$144.99	$144.99	48,266	$1,638,384,585
6/13/2018	$143.74	$143.66	$143.73	35,899	$1,623,377,822
6/12/2018	$144.79	$144.72	$144.70	44,224	$1,628,101,517
6/11/2018	$143.18	$143.10	$143.25	46,024	$1,609,905,496
6/8/2018	$142.86	$142.80	$142.77	50,537	$1,606,475,218
6/7/2018	$141.76	$141.69	$141.86	56,124	$1,594,019,724
6/6/2018	$142.91	$142.85	$142.82	54,291	$1,607,067,849
6/5/2018	$140.72	$140.60	$140.57	206,487	$1,581,792,395
6/4/2018	$140.88	$140.77	$140.92	60,399	$1,555,524,843
6/1/2018	$142.15	$142.13	$142.14	38,723	$1,570,543,303