Closing Market Price and NAV History

Date	Market Price1	Net Asset Value2	Bid/Ask Midpoint	Volume1	Net Assets2
6/29/2018	$52.32	$52.31	$52.38	85,768	$1,048,722,728
6/28/2018	$52.35	$52.34	$52.32	49,967	$1,049,412,909
6/27/2018	$52.43	$52.36	$52.42	43,477	$1,049,762,345
6/26/2018	$52.71	$52.73	$52.71	97,407	$1,057,316,624
6/25/2018	$52.72	$52.72	$52.73	83,570	$1,057,040,045
6/22/2018	$53.16	$53.17	$53.17	46,135	$1,065,984,692
6/21/2018	$52.96	$52.93	$52.94	77,524	$1,061,281,398
6/20/2018	$53.20	$53.49	$53.51	23,718	$1,069,806,594
6/19/2018	$53.42	$53.41	$53.39	55,464	$1,068,143,925
6/18/2018	$53.53	$53.53	$53.51	44,173	$1,070,597,463
6/15/2018	$53.62	$53.63	$53.59	53,050	$1,072,667,985
6/14/2018	$53.61	$53.61	$53.62	71,238	$1,072,251,784
6/13/2018	$53.46	$53.50	$53.53	167,881	$1,069,916,009
6/12/2018	$53.79	$53.77	$53.76	40,600	$1,075,387,839
6/11/2018	$53.83	$53.81	$53.84	31,337	$1,076,182,921
6/8/2018	$53.64	$53.65	$53.67	28,607	$1,073,003,108
6/7/2018	$53.46	$53.46	$53.49	42,320	$1,069,150,846
6/6/2018	$53.26	$53.28	$53.26	54,223	$1,065,598,091
6/5/2018	$52.95	$52.93	$52.97	46,873	$1,058,524,130
6/4/2018	$52.92	$52.91	$52.91	33,730	$1,058,293,345
6/1/2018	$52.72	$52.75	$52.71	20,102	$1,054,970,079