Closing Market Price and NAV History

Date	Market Price1	Net Asset Value2	Bid/Ask Midpoint	Volume1	Net Assets2
7/31/2014	$50.69	$50.65	$50.67	204,317	$861,094,356
7/30/2014	$51.77	$51.71	$51.74	44,780	$879,019,427
7/29/2014	$51.75	$51.69	$51.77	46,481	$878,707,688
7/28/2014	$51.99	$51.97	$52.02	57,436	$883,511,345
7/25/2014	$52.11	$52.08	$52.13	33,225	$885,383,373
7/24/2014	$52.52	$52.45	$52.45	85,473	$891,566,299
7/23/2014	$52.55	$52.50	$52.55	31,939	$892,526,513
7/22/2014	$52.63	$52.56	$52.59	41,360	$893,562,727
7/21/2014	$52.27	$52.21	$52.24	41,832	$882,404,762
7/18/2014	$52.49	$52.43	$52.49	35,866	$886,051,161
7/17/2014	$51.81	$51.83	$51.86	84,783	$875,858,417
7/16/2014	$52.46	$52.47	$52.50	118,425	$881,540,661
7/15/2014	$52.55	$52.50	$52.56	43,821	$882,079,615
7/14/2014	$52.75	$52.72	$52.76	38,223	$885,655,563
7/11/2014	$52.55	$52.48	$52.53	132,009	$876,352,119
7/10/2014	$52.68	$52.59	$52.61	40,969	$878,329,095
7/9/2014	$52.97	$52.95	$52.98	79,212	$884,246,278
7/8/2014	$52.86	$52.86	$52.89	51,596	$882,794,401
7/7/2014	$53.33	$53.25	$53.31	77,914	$1,043,635,877
7/3/2014	$53.81	$53.78	$53.79	19,141	$898,078,049
7/2/2014	$53.47	$53.48	$53.51	36,741	$893,139,606
7/1/2014	$53.81	$53.85	$53.82	137,706	$899,336,835