Closing Market Price and NAV History

Date	Market Price1	Net Asset Value2	Bid/Ask Midpoint	Volume1	Net Assets2
10/31/2019	$66.40	$66.37	$66.39	77,000	$2,137,576,015
10/30/2019	$66.97	$66.95	$66.94	119,700	$2,156,060,363
10/29/2019	$66.39	$66.40	$66.41	110,079	$2,138,485,871
10/28/2019	$66.86	$66.84	$66.84	80,821	$2,159,402,143
10/25/2019	$66.14	$66.15	$66.15	106,497	$2,137,027,677
10/24/2019	$65.67	$65.70	$65.69	114,187	$2,122,476,297
10/23/2019	$64.67	$64.69	$64.68	131,768	$2,089,697,164
10/22/2019	$64.79	$64.78	$64.78	124,694	$2,092,740,959
10/21/2019	$65.91	$65.92	$65.93	130,563	$2,129,530,236
10/18/2019	$65.24	$65.22	$65.22	98,812	$2,106,874,541
10/17/2019	$66.29	$66.28	$66.29	106,387	$2,141,333,069
10/16/2019	$66.18	$66.19	$66.19	175,863	$2,144,890,826
10/15/2019	$67.26	$67.25	$67.24	103,276	$2,179,190,536
10/14/2019	$66.46	$66.45	$66.44	68,269	$2,153,164,952
10/11/2019	$66.53	$66.58	$66.56	220,538	$2,157,533,943
10/10/2019	$65.58	$65.58	$65.58	156,330	$2,128,482,308
10/9/2019	$65.22	$65.28	$65.26	192,906	$2,118,627,999
10/8/2019	$64.36	$64.35	$64.34	337,293	$2,088,337,558
10/7/2019	$65.93	$65.97	$65.96	131,058	$2,144,416,165
10/4/2019	$65.90	$65.90	$65.88	962,453	$2,141,983,687
10/3/2019	$64.82	$64.82	$64.84	213,534	$2,155,700,628
10/2/2019	$63.49	$63.49	$63.50	350,933	$2,117,710,171
10/1/2019	$64.40	$64.42	$64.41	1,009,874	$2,155,154,080