Closing Market Price and NAV History

Date	Market Price1	Net Asset Value2	Bid/Ask Midpoint	Volume1	Net Assets2
3/29/2018	$40.90	$40.68	$40.69	42,413	$138,312,976
3/28/2018	$40.14	$40.09	$40.11	9,556	$136,292,804
3/27/2018	$40.35	$40.36	$40.38	7,752	$137,231,861
3/26/2018	$41.37	$41.33	$41.33	30,447	$138,445,292
3/23/2018	$40.54	$40.25	$40.28	24,054	$134,846,390
3/22/2018	$41.14	$41.09	$41.10	10,887	$137,642,128
3/21/2018	$42.26	$42.16	$42.17	7,478	$141,221,071
3/20/2018	$42.04	$42.08	$42.08	6,556	$140,962,326
3/19/2018	$41.88	$41.82	$41.83	10,786	$140,110,180
3/16/2018	$42.33	$42.31	$42.32	30,099	$141,727,959
3/15/2018	$42.25	$42.19	$42.21	3,937	$141,336,823
3/14/2018	$42.37	$42.32	$42.33	30,789	$141,772,304
3/13/2018	$42.42	$42.35	$42.36	12,089	$141,867,384
3/12/2018	$42.67	$42.63	$42.66	14,007	$142,800,699
3/9/2018	$42.65	$42.60	$42.61	4,425	$142,703,535
3/8/2018	$41.91	$41.93	$41.94	12,276	$140,455,460
3/7/2018	$41.81	$41.75	$41.78	9,914	$139,870,633
3/6/2018	$41.50	$41.45	$41.46	8,721	$138,848,838
3/5/2018	$41.07	$41.02	$41.02	5,928	$137,404,842
3/2/2018	$40.52	$40.66	$40.68	73,436	$136,224,855
3/1/2018	$40.09	$40.02	$40.03	17,595	$134,057,811