WTI/Percentage - U.S. Archive

Effective Month	Surcharge Amount	Average Monthly WTI Price	Basis Month
09/2019	14%	$57.55	07/2019
08/2019	12.8%	$54.71	06/2019
07/2019	15.2%	$60.87	05/2019
06/2019	16.4%	$63.87	04/2019
05/2019	14.4%	$58.17	03/2019
04/2019	12.8%	$54.98	02/2019
03/2019	11.6%	$51.55	01/2019
02/2019	10.4%	$48.98	12/2018
01/2019	13.6%	$56.69	11/2018
12/2018	19.2%	$70.76	10/2018
11/2018	19.2%	$70.08	09/2018
10/2018	18%	$67.85	08/2018
09/2018	19.2%	$70.58	07/2018
08/2018	18.0%	$67.32	06/2018
07/2018	18.8%	$69.98	05/2018
06/2018	17.6%	$66.33	04/2018
05/2018	16.0%	$62.77	03/2018
04/2018	16.0%	$62.18	02/2018
03/2018	16.4%	$63.66	01/2018
02/2018	14.0%	$57.95	12/2017
01/2018	13.6%	$56.66	11/2017
12/2017	11.6%	$51.59	10/2017
11/2017	10.8%	$49.88	09/2017
10/2017	10.4%	$48.06	08/2017
09/2017	9.6%	$46.68	07/2017