1981/01/01	5.44
1981/01/02	5.23
1981/01/03	4.71
1981/01/04	4.22
1981/01/05	3.75
1981/01/06	3.55
1981/01/07	3.55
1981/01/08	3.55
1981/01/09	3.46
1981/01/10	3.46
1981/01/11	3.75
1981/01/12	4.51
1981/01/13	4.51
1981/01/14	4.32
1981/01/15	4.22
1981/01/16	4.13
1981/01/17	4.22
1981/01/18	4.13
1981/01/19	4.03
1981/01/20	4.03
1981/01/21	3.94
1981/01/22	3.94
1981/01/23	4.13
1981/01/24	4.03
1981/01/25	4.03
1981/01/26	3.94
1981/01/27	3.94
1981/01/28	3.84
1981/01/29	3.75
1981/01/30	3.75
1981/01/31	3.75
1981/02/01	3.75
1981/02/02	3.75
1981/02/03	3.65
1981/02/04	3.65
1981/02/05	3.65
1981/02/06	3.55
1981/02/07	3.55
1981/02/08	3.84
1981/02/09	4.03
1981/02/10	3.94
1981/02/11	3.75
1981/02/12	3.55
1981/02/13	3.46
1981/02/14	3.27
1981/02/15	3.27
1981/02/16	3.27
1981/02/17	3.08
1981/02/18	3.18
1981/02/19	3.18
1981/02/20	3.08
1981/02/21	3.08
1981/02/22	3.08
1981/02/23	3.08
1981/02/24	3.08
1981/02/25	2.99
1981/02/26	2.99
1981/02/27	2.99
1981/02/28	3.46
1981/03/01	3.08
1981/03/02	3.08
1981/03/03	3.08
1981/03/04	3.08
1981/03/05	3.08
1981/03/06	3.08
1981/03/07	3.08
1981/03/08	2.89
1981/03/09	2.62
1981/03/10	0
1981/03/11	2.62
1981/03/12	2.70
1981/03/13	2.62
1981/03/14	2.62
1981/03/15	2.62
1981/03/16	2.62
1981/03/17	2.53
1981/03/18	2.11
1981/03/19	1.66
1981/03/20	1.66
1981/03/21	1.66
1981/03/22	1.66
1981/03/23	1.66
1981/03/24	1.66
1981/03/25	1.66
1981/03/26	1.66
1981/03/27	1.66
1981/03/28	1.66
1981/03/29	1.66
1981/03/30	1.66
1981/03/31	1.66
1981/04/01	2.08
1981/04/02	4.51
1981/04/03	4.81
1981/04/04	3.34
1981/04/05	2.98
1981/04/06	2.98
1981/04/07	2.80
1981/04/08	2.56
1981/04/09	2.56
1981/04/10	2.24
1981/04/11	1.78
1981/04/12	1.78
1981/04/13	2.24
1981/04/14	9.19
1981/04/15	7.49
1981/04/16	4.60
1981/04/17	3.34
1981/04/18	2.98
1981/04/19	3.07
1981/04/20	2.89
1981/04/21	3.34
1981/04/22	7.27
1981/04/23	4.06
1981/04/24	3.25
1981/04/25	6.70
1981/04/26	4.06
1981/04/27	4.42
1981/04/28	3.61
1981/04/29	2.98
1981/04/30	2.56
1981/05/01	3.07
1981/05/02	9.19
1981/05/03	4.15
1981/05/04	4.42
1981/05/05	13.69
1981/05/06	20.94
1981/05/07	10.98
1981/05/08	8.74
1981/05/09	13.69
1981/05/10	10.72
1981/05/11	8.51
1981/05/12	7.61
1981/05/13	6.07
1981/05/14	5.96
1981/05/15	12.26
1981/05/16	9.99
1981/05/17	18.28
1981/05/18	38.24
1981/05/19	23.70
1981/05/20	16.20
1981/05/21	10.10
1981/05/22	14.60
1981/05/23	14.08
1981/05/24	13.69
1981/05/25	13.82
1981/05/26	16.46
1981/05/27	14.21
1981/05/28	10.10
1981/05/29	11.23
1981/05/30	9.42
1981/05/31	10.10
1981/06/01	7.61
1981/06/02	8.85
1981/06/03	9.65
1981/06/04	9.65
1981/06/05	9.31
1981/06/06	9.08
1981/06/07	9.19
1981/06/08	14.34
1981/06/09	11.61
1981/06/10	8.74
1981/06/11	7.38
1981/06/12	9.42
1981/06/13	15.25
1981/06/14	11.74
1981/06/15	8.17
1981/06/16	7.72
1981/06/17	8.06
1981/06/18	7.04
1981/06/19	9.87
1981/06/20	13.04
1981/06/21	25.05
1981/06/22	32.20
1981/06/23	33.64
1981/06/24	46.06
1981/06/25	48.40
1981/06/26	48.76
1981/06/27	43.40
1981/06/28	30.44
1981/06/29	23.12
1981/06/30	18.00
1981/07/01	14.99
1981/07/02	12.91
1981/07/03	10.98
1981/07/04	10.10
1981/07/05	12.52
1981/07/06	56.75
1981/07/07	105.48
1981/07/08	142.00
1981/07/09	118.86
1981/07/10	103.74
1981/07/11	94.71
1981/07/12	75.19
1981/07/13	57.90
1981/07/14	40.45
1981/07/15	33.80
1981/07/16	34.44
1981/07/17	37.90
1981/07/18	32.36
1981/07/19	43.23
1981/07/20	116.50
1981/07/21	149.25
1981/07/22	136.70
1981/07/23	118.24
1981/07/24	98.93
1981/07/25	85.68
1981/07/26	103.08
1981/07/27	98.93
1981/07/28	86.70
1981/07/29	93.26
1981/07/30	81.12
1981/07/31	77.52
1981/08/01	76.57
1981/08/02	81.86
1981/08/03	92.10
1981/08/04	88.00
1981/08/05	102.09
1981/08/06	156.50
1981/08/07	147.80
1981/08/08	131.40
1981/08/09	117.00
1981/08/10	116.00
1981/08/11	160.40
1981/08/12	164.30
1981/08/13	140.94
1981/08/14	124.02
1981/08/15	108.40
1981/08/16	89.86
1981/08/17	73.84
1981/08/18	62.90
1981/08/19	54.47
1981/08/20	52.00
1981/08/21	53.52
1981/08/22	49.48
1981/08/23	51.46
1981/08/24	54.09
1981/08/25	52.95
1981/08/26	43.93
1981/08/27	31.56
1981/08/28	29.96
1981/08/29	28.36
1981/08/30	32.68
1981/08/31	36.88
1981/09/01	82.11
1981/09/02	137.76
1981/09/03	114.50
1981/09/04	99.55
1981/09/05	107.28
1981/09/06	140.94
1981/09/07	136.70
1981/09/08	110.80
1981/09/09	94.71
1981/09/10	78.96
1981/09/11	68.00
1981/09/12	56.18
1981/09/13	49.84
1981/09/14	54.09
1981/09/15	58.90
1981/09/16	42.88
1981/09/17	38.92
1981/09/18	35.56
1981/09/19	33.96
1981/09/20	32.04
1981/09/21	29.48
1981/09/22	27.15
1981/09/23	27.00
1981/09/24	31.40
1981/09/25	33.80
1981/09/26	34.76
1981/09/27	30.12
1981/09/28	30.12
1981/09/29	32.04
1981/09/30	29.96
1981/10/01	26.25
1981/10/02	25.05
1981/10/03	30.12
1981/10/04	25.95
1981/10/05	35.24
1981/10/06	39.94
1981/10/07	49.30
1981/10/08	54.09
1981/10/09	49.30
1981/10/10	38.07
1981/10/11	33.48
1981/10/12	27.90
1981/10/13	25.20
1981/10/14	23.27
1981/10/15	21.81
1981/10/16	22.11
1981/10/17	32.52
1981/10/18	29.00
1981/10/19	26.40
1981/10/20	24.90
1981/10/21	24.00
1981/10/22	22.25
1981/10/23	21.09
1981/10/24	20.38
1981/10/25	19.26
1981/10/26	18.00
1981/10/27	17.44
1981/10/28	16.88
1981/10/29	16.88
1981/10/30	16.46
1981/10/31	16.60
1981/11/01	16.33
1981/11/02	15.65
1981/11/03	15.52
1981/11/04	16.74
1981/11/05	25.65
1981/11/06	24.45
1981/11/07	18.98
1981/11/08	16.46
1981/11/09	15.25
1981/11/10	14.08
1981/11/11	13.43
1981/11/12	13.04
1981/11/13	12.52
1981/11/14	12.52
1981/11/15	12.52
1981/11/16	12.39
1981/11/17	12.39
1981/11/18	12.91
1981/11/19	11.87
1981/11/20	11.35
1981/11/21	11.10
1981/11/22	10.98
1981/11/23	10.85
1981/11/24	10.72
1981/11/25	10.60
1981/11/26	10.48
1981/11/27	11.23
1981/11/28	11.35
1981/11/29	9.65
1981/11/30	9.08
1981/12/01	8.51
1981/12/02	8.40
1981/12/03	8.29
1981/12/04	8.06
1981/12/05	7.95
1981/12/06	7.95
1981/12/07	7.83
1981/12/08	7.83
1981/12/09	7.83
1981/12/10	7.72
1981/12/11	7.72
1981/12/12	7.61
1981/12/13	7.61
1981/12/14	7.61
1981/12/15	7.49
1981/12/16	7.38
1981/12/17	7.38
1981/12/18	7.15
1981/12/19	7.04
1981/12/20	6.93
1981/12/21	6.93
1981/12/22	6.81
1981/12/23	6.81
1981/12/24	6.81
1981/12/25	6.81
1981/12/26	6.70
1981/12/27	6.70
1981/12/28	6.70
1981/12/29	6.59
1981/12/30	6.59
1981/12/31	6.59
#===========================================
# Number of observations = 365 / 365
# Average = 26.27