Closing Market Price and NAV History

Date	Market Price1	Net Asset Value2	Bid/Ask Midpoint	Volume1	Net Assets2
12/31/2019	$84.20	$84.26	$84.23	27,581	$1,150,110,490
12/30/2019	$83.85	$83.89	$83.88	151,716	$1,145,114,433
12/27/2019	$84.46	$84.47	$84.47	265,343	$1,161,511,225
12/26/2019	$84.53	$84.51	$84.52	20,409	$1,178,974,523
12/24/2019	$84.96	$84.93	$84.95	12,386	$1,184,746,442
12/23/2019	$84.91	$84.93	$84.94	27,810	$1,171,986,929
12/20/2019	$84.72	$84.70	$84.69	159,189	$1,168,827,382
12/19/2019	$83.95	$83.92	$83.92	29,025	$1,153,881,845
12/18/2019	$83.57	$83.55	$83.56	54,489	$1,157,223,434
12/17/2019	$83.46	$83.43	$83.43	61,191	$1,159,654,544
12/16/2019	$83.74	$83.72	$83.72	39,625	$1,163,713,953
12/13/2019	$82.79	$82.74	$82.83	34,300	$1,150,035,339
12/12/2019	$82.98	$83.03	$83.03	23,153	$1,154,074,963
12/11/2019	$82.33	$82.37	$82.37	22,460	$1,144,912,935
12/10/2019	$82.35	$82.35	$82.36	17,619	$1,144,663,997
12/9/2019	$82.32	$82.34	$82.34	35,443	$1,144,543,089
12/6/2019	$83.42	$83.43	$83.44	24,927	$1,159,743,871
12/5/2019	$82.66	$82.71	$82.73	41,932	$1,149,727,901
12/4/2019	$82.99	$83.00	$83.01	57,048	$1,153,706,477
12/3/2019	$82.53	$82.49	$82.50	193,820	$1,146,644,654
12/2/2019	$82.53	$82.50	$82.52	185,100	$1,138,559,062