1981/01/01	11.50
1981/01/02	11.25
1981/01/03	11.25
1981/01/04	11.00
1981/01/05	10.75
1981/01/06	10.50
1981/01/07	10.50
1981/01/08	10.25
1981/01/09	10.25
1981/01/10	10.00
1981/01/11	9.75
1981/01/12	9.75
1981/01/13	9.25
1981/01/14	9.25
1981/01/15	9.00
1981/01/16	8.75
1981/01/17	8.75
1981/01/18	8.75
1981/01/19	8.50
1981/01/20	8.50
1981/01/21	8.25
1981/01/22	8.25
1981/01/23	8.25
1981/01/24	8.25
1981/01/25	8.00
1981/01/26	8.00
1981/01/27	8.00
1981/01/28	7.80
1981/01/29	7.60
1981/01/30	7.60
1981/01/31	7.40
1981/02/01	7.40
1981/02/02	7.20
1981/02/03	7.20
1981/02/04	7.20
1981/02/05	7.20
1981/02/06	7.00
1981/02/07	7.40
1981/02/08	7.20
1981/02/09	7.80
1981/02/10	7.40
1981/02/11	7.40
1981/02/12	7.20
1981/02/13	7.00
1981/02/14	6.80
1981/02/15	6.60
1981/02/16	6.60
1981/02/17	6.40
1981/02/18	6.20
1981/02/19	6.20
1981/02/20	6.20
1981/02/21	6.00
1981/02/22	6.00
1981/02/23	6.00
1981/02/24	6.00
1981/02/25	5.80
1981/02/26	5.80
1981/02/27	5.60
1981/02/28	5.60
1981/03/01	5.40
1981/03/02	6.40
1981/03/03	6.60
1981/03/04	6.20
1981/03/05	5.80
1981/03/06	5.80
1981/03/07	5.80
1981/03/08	5.60
1981/03/09	5.60
1981/03/10	6.40
1981/03/11	6.40
1981/03/12	6.40
1981/03/13	6.60
1981/03/14	6.60
1981/03/15	6.40
1981/03/16	6.20
1981/03/17	5.80
1981/03/18	5.40
1981/03/19	5.00
1981/03/20	4.80
1981/03/21	4.40
1981/03/22	4.20
1981/03/23	4.20
1981/03/24	4.20
1981/03/25	4.20
1981/03/26	4.00
1981/03/27	4.00
1981/03/28	4.00
1981/03/29	4.00
1981/03/30	3.87
1981/03/31	3.87
1981/04/01	3.80
1981/04/02	4.00
1981/04/03	4.40
1981/04/04	5.60
1981/04/05	7.57
1981/04/06	6.23
1981/04/07	5.40
1981/04/08	5.00
1981/04/09	4.40
1981/04/10	4.00
1981/04/11	3.80
1981/04/12	3.80
1981/04/13	9.83
1981/04/14	7.57
1981/04/15	16.06
1981/04/16	18.30
1981/04/17	16.90
1981/04/18	9.60
1981/04/19	8.70
1981/04/20	8.70
1981/04/21	7.57
1981/04/22	6.23
1981/04/23	5.80
1981/04/24	8.70
1981/04/25	6.90
1981/04/26	6.00
1981/04/27	8.70
1981/04/28	7.13
1981/04/29	7.13
1981/04/30	6.68
1981/05/01	6.00
1981/05/02	5.60
1981/05/03	8.25
1981/05/04	12.50
1981/05/05	10.75
1981/05/06	12.00
1981/05/07	25.20
1981/05/08	24.60
1981/05/09	15.50
1981/05/10	13.75
1981/05/11	16.62
1981/05/12	12.00
1981/05/13	9.38
1981/05/14	8.03
1981/05/15	7.57
1981/05/16	8.03
1981/05/17	10.28
1981/05/18	17.46
1981/05/19	54.62
1981/05/20	45.00
1981/05/21	38.78
1981/05/22	49.00
1981/05/23	60.80
1981/05/24	66.00
1981/05/25	49.00
1981/05/26	34.55
1981/05/27	29.10
1981/05/28	30.00
1981/05/29	45.00
1981/05/30	39.43
1981/05/31	39.43
1981/06/01	25.50
1981/06/02	24.90
1981/06/03	23.42
1981/06/04	35.20
1981/06/05	30.65
1981/06/06	27.60
1981/06/07	22.55
1981/06/08	20.82
1981/06/09	21.10
1981/06/10	23.42
1981/06/11	18.58
1981/06/12	18.30
1981/06/13	18.30
1981/06/14	20.82
1981/06/15	22.84
1981/06/16	19.98
1981/06/17	15.78
1981/06/18	16.62
1981/06/19	17.74
1981/06/20	18.30
1981/06/21	21.10
1981/06/22	30.00
1981/06/23	51.25
1981/06/24	61.60
1981/06/25	71.35
1981/06/26	88.50
1981/06/27	86.00
1981/06/28	82.60
1981/06/29	66.40
1981/06/30	49.75
1981/07/01	36.50
1981/07/02	29.10
1981/07/03	24.60
1981/07/04	20.54
1981/07/05	18.58
1981/07/06	42.55
1981/07/07	197.74
1981/07/08	255.90
1981/07/09	259.52
1981/07/10	201.04
1981/07/11	195.10
1981/07/12	185.90
1981/07/13	159.00
1981/07/14	131.33
1981/07/15	96.00
1981/07/16	72.25
1981/07/17	74.95
1981/07/18	75.85
1981/07/19	73.15
1981/07/20	141.10
1981/07/21	260.25
1981/07/22	279.83
1981/07/23	257.35
1981/07/24	239.00
1981/07/25	247.40
1981/07/26	250.90
1981/07/27	229.90
1981/07/28	240.40
1981/07/29	221.62
1981/07/30	207.64
1981/07/31	201.04
1981/08/01	185.25
1981/08/02	176.50
1981/08/03	195.76
1981/08/04	187.21
1981/08/05	207.64
1981/08/06	252.30
1981/08/07	270.40
1981/08/08	301.57
1981/08/09	318.50
1981/08/10	297.23
1981/08/11	282.00
1981/08/12	271.13
1981/08/13	281.27
1981/08/14	297.95
1981/08/15	283.45
1981/08/16	245.30
1981/08/17	206.98
1981/08/18	173.38
1981/08/19	142.25
1981/08/20	121.15
1981/08/21	118.40
1981/08/22	107.18
1981/08/23	96.50
1981/08/24	89.00
1981/08/25	81.70
1981/08/26	73.60
1981/08/27	68.80
1981/08/28	68.00
1981/08/29	65.20
1981/08/30	62.40
1981/08/31	61.60
1981/09/01	73.15
1981/09/02	118.95
1981/09/03	159.62
1981/09/04	202.36
1981/09/05	218.25
1981/09/06	215.59
1981/09/07	243.20
1981/09/08	251.60
1981/09/09	246.70
1981/09/10	220.95
1981/09/11	195.10
1981/09/12	175.25
1981/09/13	135.93
1981/09/14	120.60
1981/09/15	110.85
1981/09/16	98.50
1981/09/17	86.00
1981/09/18	79.45
1981/09/19	75.40
1981/09/20	72.25
1981/09/21	66.80
1981/09/22	62.00
1981/09/23	62.80
1981/09/24	78.55
1981/09/25	71.80
1981/09/26	65.60
1981/09/27	64.80
1981/09/28	72.25
1981/09/29	79.00
1981/09/30	77.20
1981/10/01	75.85
1981/10/02	63.60
1981/10/03	65.20
1981/10/04	67.20
1981/10/05	63.20
1981/10/06	77.20
1981/10/07	90.00
1981/10/08	109.27
1981/10/09	115.10
1981/10/10	112.95
1981/10/11	121.70
1981/10/12	102.50
1981/10/13	85.00
1981/10/14	70.00
1981/10/15	62.80
1981/10/16	63.20
1981/10/17	88.50
1981/10/18	108.22
1981/10/19	111.37
1981/10/20	86.50
1981/10/21	75.85
1981/10/22	68.00
1981/10/23	61.20
1981/10/24	56.50
1981/10/25	52.75
1981/10/26	49.75
1981/10/27	46.05
1981/10/28	43.60
1981/10/29	41.50
1981/10/30	39.75
1981/10/31	38.13
1981/11/01	37.48
1981/11/02	37.15
1981/11/03	36.82
1981/11/04	41.15
1981/11/05	47.88
1981/11/06	65.60
1981/11/07	63.60
1981/11/08	52.00
1981/11/09	42.55
1981/11/10	38.45
1981/11/11	35.20
1981/11/12	33.25
1981/11/13	31.95
1981/11/14	31.30
1981/11/15	30.65
1981/11/16	30.00
1981/11/17	30.32
1981/11/18	31.30
1981/11/19	31.62
1981/11/20	29.40
1981/11/21	27.60
1981/11/22	26.10
1981/11/23	25.20
1981/11/24	24.30
1981/11/25	24.30
1981/11/26	23.71
1981/11/27	24.30
1981/11/28	25.80
1981/11/29	25.50
1981/11/30	23.13
1981/12/01	21.97
1981/12/02	20.54
1981/12/03	20.26
1981/12/04	19.70
1981/12/05	19.42
1981/12/06	19.14
1981/12/07	18.58
1981/12/08	18.30
1981/12/09	17.74
1981/12/10	17.18
1981/12/11	16.90
1981/12/12	16.62
1981/12/13	16.06
1981/12/14	15.78
1981/12/15	15.25
1981/12/16	14.75
1981/12/17	14.50
1981/12/18	14.00
1981/12/19	13.75
1981/12/20	13.75
1981/12/21	13.50
1981/12/22	13.25
1981/12/23	13.00
1981/12/24	13.00
1981/12/25	12.75
1981/12/26	12.75
1981/12/27	12.50
1981/12/28	12.50
1981/12/29	12.50
1981/12/30	12.50
1981/12/31	12.50
#===========================================
# Number of observations = 365 / 365
# Average = 57.14