Crude oil spot prices( Source : Banco de México)
Date	WTI		Latest 30days			Latest 30days
01/02/1996	19.81		Date	WTI
01/03/1996	19.89		04/24/2015	55.55
01/04/1996	19.91		04/27/2015	56.99
01/05/1996	20.26		04/28/2015	57.06
01/08/1996	20.26		04/29/2015	58.58
01/09/1996	19.95		04/30/2015	59.63
01/10/1996	19.67		05/01/2015	59.15
01/11/1996	18.79		05/04/2015	58.93
01/12/1996	18.25		05/05/2015	60.40
01/15/1996	18.38		05/06/2015	60.93
			05/07/2015	58.94
・・・	・・・		05/08/2015	59.39
			05/11/2015	59.25
04/24/2015	55.55		05/12/2015	60.75
04/27/2015	56.99		05/14/2015	59.88
04/28/2015	57.06		05/15/2015	59.69
04/29/2015	58.58		05/18/2015	59.43
04/30/2015	59.63		05/19/2015	57.26		From1996/1/2 to Present
05/01/2015	59.15		05/20/2015	58.48
05/04/2015	58.93		05/21/2015	59.97
05/05/2015	60.40		05/22/2015	59.02
05/06/2015	60.93		05/25/2015	59.02
05/07/2015	58.94		05/26/2015	58.03
05/08/2015	59.39		05/27/2015	57.51
05/11/2015	59.25		05/28/2015	57.68
05/12/2015	60.75		05/29/2015	60.30
05/14/2015	59.88		06/01/2015	60.20
05/15/2015	59.69		06/02/2015	61.26
05/18/2015	59.43		06/03/2015	59.64
05/19/2015	57.26		06/04/2015	58.00
05/20/2015	58.48		06/05/2015	59.13
05/21/2015	59.97
05/22/2015	59.02
05/25/2015	59.02
05/26/2015	58.03
05/27/2015	57.51
05/28/2015	57.68
05/29/2015	60.30
06/01/2015	60.20
06/02/2015	61.26
06/03/2015	59.64
06/04/2015	58.00
06/05/2015	59.13