Closing Market Price and NAV History

Date	Market Price1	Net Asset Value2	Bid/Ask Midpoint	Volume1	Net Assets2
8/30/2019	$57.73	$57.74	$57.70	170,326	$2,222,802,144
8/29/2019	$57.85	$57.84	$57.84	192,520	$2,226,965,705
8/28/2019	$56.68	$56.66	$56.65	178,211	$2,181,378,766
8/27/2019	$56.87	$56.87	$56.86	383,290	$2,186,718,808
8/26/2019	$57.18	$57.15	$57.17	316,673	$2,197,244,959
8/23/2019	$56.45	$56.40	$56.41	246,009	$2,168,485,170
8/22/2019	$57.56	$57.52	$57.53	180,342	$2,211,681,026
8/21/2019	$57.44	$57.47	$57.48	211,296	$2,209,555,330
8/20/2019	$56.63	$56.59	$56.62	176,486	$2,173,153,442
8/19/2019	$56.97	$56.94	$56.94	268,309	$2,186,523,835
8/16/2019	$56.58	$56.59	$56.59	161,381	$2,173,149,223
8/15/2019	$55.56	$55.53	$55.53	218,236	$2,132,261,961
8/14/2019	$55.46	$55.49	$55.49	802,102	$2,130,807,812
8/13/2019	$57.19	$57.15	$57.16	233,025	$2,174,563,714
8/12/2019	$56.30	$56.34	$56.33	183,050	$2,143,650,536
8/9/2019	$56.89	$56.92	$56.93	171,267	$2,165,765,767
8/8/2019	$57.13	$57.10	$57.11	365,643	$2,178,513,251
8/7/2019	$55.66	$55.67	$55.67	233,641	$2,126,710,895
8/6/2019	$55.56	$55.57	$55.55	363,095	$2,128,268,974
8/5/2019	$55.08	$55.12	$55.10	580,572	$2,113,806,544
8/2/2019	$57.25	$57.23	$57.22	346,599	$2,203,338,757
8/1/2019	$58.50	$58.53	$58.54	195,399	$2,256,260,811