1981/01/01	181.60
1981/01/02	166.90
1981/01/03	172.10
1981/01/04	165.60
1981/01/05	170.80
1981/01/06	176.00
1981/01/07	169.50
1981/01/08	159.10
1981/01/09	156.50
1981/01/10	143.50
1981/01/11	119.00
1981/01/12	114.20
1981/01/13	119.00
1981/01/14	129.80
1981/01/15	146.10
1981/01/16	156.50
1981/01/17	159.10
1981/01/18	157.80
1981/01/19	148.70
1981/01/20	142.20
1981/01/21	135.80
1981/01/22	126.20
1981/01/23	122.60
1981/01/24	129.80
1981/01/25	123.80
1981/01/26	123.80
1981/01/27	121.40
1981/01/28	129.80
1981/01/29	123.80
1981/01/30	126.20
1981/01/31	139.60
1981/02/01	140.90
1981/02/02	142.20
1981/02/03	139.60
1981/02/04	134.60
1981/02/05	134.60
1981/02/06	152.60
1981/02/07	155.20
1981/02/08	150.00
1981/02/09	152.60
1981/02/10	143.50
1981/02/11	142.20
1981/02/12	143.50
1981/02/13	144.80
1981/02/14	139.60
1981/02/15	129.80
1981/02/16	135.80
1981/02/17	131.00
1981/02/18	131.00
1981/02/19	140.90
1981/02/20	137.00
1981/02/21	132.20
1981/02/22	138.30
1981/02/23	140.90
1981/02/24	138.30
1981/02/25	144.80
1981/02/26	152.60
1981/02/27	151.30
1981/02/28	160.40
1981/03/01	148.70
1981/03/02	148.70
1981/03/03	143.50
1981/03/04	137.00
1981/03/05	133.40
1981/03/06	143.50
1981/03/07	140.90
1981/03/08	148.70
1981/03/09	155.20
1981/03/10	151.30
1981/03/11	161.70
1981/03/12	156.50
1981/03/13	155.20
1981/03/14	152.60
1981/03/15	156.50
1981/03/16	151.30
1981/03/17	150.00
1981/03/18	140.90
1981/03/19	140.90
1981/03/20	128.60
1981/03/21	129.80
1981/03/22	131.00
1981/03/23	140.90
1981/03/24	140.90
1981/03/25	137.00
1981/03/26	139.60
1981/03/27	138.30
1981/03/28	143.50
1981/03/29	148.70
1981/03/30	150.00
1981/03/31	150.00
1981/04/01	155.20
1981/04/02	148.70
1981/04/03	137.00
1981/04/04	146.10
1981/04/05	150.00
1981/04/06	153.90
1981/04/07	163.00
1981/04/08	163.00
1981/04/09	165.60
1981/04/10	164.30
1981/04/11	153.90
1981/04/12	151.30
1981/04/13	143.50
1981/04/14	140.90
1981/04/15	133.40
1981/04/16	127.40
1981/04/17	135.80
1981/04/18	135.80
1981/04/19	134.60
1981/04/20	133.40
1981/04/21	144.80
1981/04/22	150.00
1981/04/23	144.80
1981/04/24	146.10
1981/04/25	146.10
1981/04/26	153.90
1981/04/27	155.20
1981/04/28	147.40
1981/04/29	155.20
1981/04/30	153.90
1981/05/01	139.60
1981/05/02	140.90
1981/05/03	155.20
1981/05/04	157.80
1981/05/05	160.40
1981/05/06	159.10
1981/05/07	163.00
1981/05/08	166.90
1981/05/09	176.00
1981/05/10	185.80
1981/05/11	180.20
1981/05/12	177.40
1981/05/13	170.80
1981/05/14	169.50
1981/05/15	155.20
1981/05/16	142.20
1981/05/17	152.60
1981/05/18	170.80
1981/05/19	190.00
1981/05/20	196.00
1981/05/21	197.50
1981/05/22	187.20
1981/05/23	191.50
1981/05/24	199.00
1981/05/25	215.50
1981/05/26	258.00
1981/05/27	376.50
1981/05/28	462.20
1981/05/29	446.00
1981/05/30	492.80
1981/05/31	528.00
1981/06/01	529.90
1981/06/02	528.00
1981/06/03	529.90
1981/06/04	496.40
1981/06/05	415.60
1981/06/06	429.80
1981/06/07	412.20
1981/06/08	476.60
1981/06/09	498.20
1981/06/10	531.80
1981/06/11	528.00
1981/06/12	503.60
1981/06/13	458.60
1981/06/14	431.60
1981/06/15	422.60
1981/06/16	437.00
1981/06/17	433.40
1981/06/18	435.20
1981/06/19	408.80
1981/06/20	373.10
1981/06/21	378.20
1981/06/22	405.40
1981/06/23	395.20
1981/06/24	364.60
1981/06/25	318.70
1981/06/26	298.30
1981/06/27	298.30
1981/06/28	325.50
1981/06/29	340.80
1981/06/30	342.50
1981/07/01	339.10
1981/07/02	334.00
1981/07/03	313.60
1981/07/04	310.20
1981/07/05	320.40
1981/07/06	296.60
1981/07/07	242.50
1981/07/08	209.50
1981/07/09	194.50
1981/07/10	190.00
1981/07/11	238.00
1981/07/12	368.00
1981/07/13	426.20
1981/07/14	407.10
1981/07/15	424.40
1981/07/16	420.80
1981/07/17	385.00
1981/07/18	361.20
1981/07/19	368.00
1981/07/20	390.10
1981/07/21	388.40
1981/07/22	368.00
1981/07/23	352.70
1981/07/24	424.40
1981/07/25	575.50
1981/07/26	689.30
1981/07/27	734.80
1981/07/28	770.00
1981/07/29	785.40
1981/07/30	774.40
1981/07/31	759.00
1981/08/01	759.00
1981/08/02	803.00
1981/08/03	834.70
1981/08/04	848.50
1981/08/05	879.20
1981/08/06	903.20
1981/08/07	917.60
1981/08/08	915.20
1981/08/09	934.40
1981/08/10	951.20
1981/08/11	958.50
1981/08/12	988.80
1981/08/13	991.40
1981/08/14	988.80
1981/08/15	976.00
1981/08/16	968.50
1981/08/17	971.00
1981/08/18	988.80
1981/08/19	971.00
1981/08/20	951.20
1981/08/21	934.40
1981/08/22	936.80
1981/08/23	951.20
1981/08/24	944.00
1981/08/25	941.60
1981/08/26	936.80
1981/08/27	915.20
1981/08/28	896.00
1981/08/29	872.00
1981/08/30	846.20
1981/08/31	837.00
1981/09/01	837.00
1981/09/02	827.80
1981/09/03	814.00
1981/09/04	796.40
1981/09/05	798.60
1981/09/06	834.70
1981/09/07	876.80
1981/09/08	910.40
1981/09/09	932.00
1981/09/10	951.20
1981/09/11	915.20
1981/09/12	898.40
1981/09/13	903.20
1981/09/14	905.60
1981/09/15	905.60
1981/09/16	896.00
1981/09/17	864.80
1981/09/18	816.30
1981/09/19	765.60
1981/09/20	743.60
1981/09/21	750.20
1981/09/22	734.80
1981/09/23	750.20
1981/09/24	774.40
1981/09/25	794.20
1981/09/26	787.60
1981/09/27	803.00
1981/09/28	816.30
1981/09/29	807.40
1981/09/30	770.00
1981/10/01	697.70
1981/10/02	592.60
1981/10/03	526.10
1981/10/04	529.90
1981/10/05	529.90
1981/10/06	524.20
1981/10/07	492.80
1981/10/08	455.00
1981/10/09	371.40
1981/10/10	294.90
1981/10/11	261.20
1981/10/12	281.30
1981/10/13	308.50
1981/10/14	322.10
1981/10/15	339.10
1981/10/16	327.20
1981/10/17	296.60
1981/10/18	264.40
1981/10/19	262.80
1981/10/20	241.00
1981/10/21	245.50
1981/10/22	301.70
1981/10/23	339.10
1981/10/24	368.00
1981/10/25	369.70
1981/10/26	340.80
1981/10/27	315.30
1981/10/28	264.40
1981/10/29	227.50
1981/10/30	224.50
1981/10/31	220.00
1981/11/01	206.50
1981/11/02	202.00
1981/11/03	190.00
1981/11/04	188.60
1981/11/05	202.00
1981/11/06	197.50
1981/11/07	200.50
1981/11/08	224.50
1981/11/09	276.20
1981/11/10	361.20
1981/11/11	550.80
1981/11/12	811.80
1981/11/13	869.60
1981/11/14	853.10
1981/11/15	811.80
1981/11/16	741.40
1981/11/17	687.20
1981/11/18	689.30
1981/11/19	778.80
1981/11/20	811.80
1981/11/21	932.00
1981/11/22	1062.00
1981/11/23	1132.20
1981/11/24	1163.60
1981/11/25	1182.60
1981/11/26	1182.60
1981/11/27	1156.00
1981/11/28	1145.80
1981/11/29	1118.90
1981/11/30	1085.20
1981/12/01	1073.60
1981/12/02	1050.80
1981/12/03	1039.60
1981/12/04	1004.40
1981/12/05	986.20
1981/12/06	941.60
1981/12/07	898.40
1981/12/08	853.10
1981/12/09	805.20
1981/12/10	752.40
1981/12/11	695.60
1981/12/12	656.00
1981/12/13	644.00
1981/12/14	613.50
1981/12/15	583.10
1981/12/16	588.80
1981/12/17	604.00
1981/12/18	577.40
1981/12/19	500.00
1981/12/20	491.00
1981/12/21	528.00
1981/12/22	529.90
1981/12/23	529.90
1981/12/24	522.30
1981/12/25	510.90
1981/12/26	471.20
1981/12/27	464.00
1981/12/28	442.40
1981/12/29	420.80
1981/12/30	402.00
1981/12/31	356.10
#===========================================
# Number of observations = 365 / 365
# Average = 428.27