Closing Market Price and NAV History

Date	Market Price1	Net Asset Value2	Bid/Ask Midpoint	Volume1	Net Assets2
12/31/2018	$52.61	$52.68	$52.49	34,821	$79,022,463
12/28/2018	$52.08	$52.36	$52.19	52,958	$78,538,561
12/27/2018	$51.83	$51.25	$51.69	23,250	$76,876,163
12/26/2018	$51.63	$52.09	$51.80	16,279	$78,141,694
12/24/2018	$50.49	$51.10	$50.67	7,578	$76,646,488
12/21/2018	$51.17	$51.47	$51.26	10,515	$77,211,898
12/20/2018	$51.80	$52.05	$51.90	24,656	$78,074,749
12/19/2018	$52.21	$52.39	$52.24	16,322	$78,583,631
12/18/2018	$52.62	$52.64	$52.43	22,869	$78,960,037
12/17/2018	$52.57	$52.67	$52.65	47,031	$78,998,002
12/14/2018	$53.36	$53.34	$53.31	7,458	$80,011,997
12/13/2018	$53.93	$54.19	$54.00	16,230	$81,292,221
12/12/2018	$54.22	$54.43	$54.25	23,737	$81,643,642
12/11/2018	$53.44	$53.34	$53.39	5,499	$80,015,577
12/10/2018	$53.00	$53.01	$53.03	6,119	$79,519,409
12/7/2018	$53.62	$53.60	$53.46	25,152	$80,406,329
12/6/2018	$54.01	$53.97	$53.61	21,328	$80,962,432
12/4/2018	$54.81	$54.93	$54.79	6,613	$93,387,253
12/3/2018	$56.27	$56.16	$56.12	7,387	$95,472,409