1981/01/01	0.82
1981/01/02	0.80
1981/01/03	0.80
1981/01/04	0.78
1981/01/05	0.78
1981/01/06	0.78
1981/01/07	0.78
1981/01/08	0.78
1981/01/09	0.76
1981/01/10	0.76
1981/01/11	0.74
1981/01/12	0.72
1981/01/13	0.70
1981/01/14	0.70
1981/01/15	0.70
1981/01/16	0.72
1981/01/17	0.70
1981/01/18	0.70
1981/01/19	0.70
1981/01/20	0.70
1981/01/21	0.70
1981/01/22	0.70
1981/01/23	0.70
1981/01/24	0.66
1981/01/25	0.64
1981/01/26	0.64
1981/01/27	0.62
1981/01/28	0.60
1981/01/29	0.60
1981/01/30	0.58
1981/01/31	0.58
1981/02/01	0.56
1981/02/02	0.56
1981/02/03	0.62
1981/02/04	0.58
1981/02/05	0.52
1981/02/06	0.60
1981/02/07	0.58
1981/02/08	0.56
1981/02/09	0.56
1981/02/10	0.50
1981/02/11	0.50
1981/02/12	0.50
1981/02/13	0.54
1981/02/14	0.58
1981/02/15	0.62
1981/02/16	0.68
1981/02/17	0.72
1981/02/18	0.74
1981/02/19	0.72
1981/02/20	0.76
1981/02/21	0.76
1981/02/22	0.78
1981/02/23	0.72
1981/02/24	0.72
1981/02/25	0.70
1981/02/26	0.68
1981/02/27	0.68
1981/02/28	0.72
1981/03/01	1.17
1981/03/02	0.76
1981/03/03	0.68
1981/03/04	0.56
1981/03/05	0.56
1981/03/06	0.58
1981/03/07	0.52
1981/03/08	0.50
1981/03/09	0.54
1981/03/10	0.48
1981/03/11	0.44
1981/03/12	0.46
1981/03/13	0.48
1981/03/14	0.48
1981/03/15	0.62
1981/03/16	0.56
1981/03/17	0.54
1981/03/18	0.48
1981/03/19	0.50
1981/03/20	0.46
1981/03/21	0.44
1981/03/22	0.44
1981/03/23	0.44
1981/03/24	0.40
1981/03/25	0.38
1981/03/26	0.36
1981/03/27	0.36
1981/03/28	0.36
1981/03/29	0.40
1981/03/30	0.38
1981/03/31	0.52
1981/04/01	0.32
1981/04/02	0.36
1981/04/03	0.44
1981/04/04	0.90
1981/04/05	0.72
1981/04/06	0.72
1981/04/07	0.44
1981/04/08	0.32
1981/04/09	0.28
1981/04/10	0.24
1981/04/11	0.48
1981/04/12	1.20
1981/04/13	1.20
1981/04/14	13.77
1981/04/15	3.46
1981/04/16	1.90
1981/04/17	3.30
1981/04/18	1.54
1981/04/19	3.70
1981/04/20	3.23
1981/04/21	2.67
1981/04/22	37.94
1981/04/23	15.30
1981/04/24	3.86
1981/04/25	2.25
1981/04/26	1.72
1981/04/27	1.54
1981/04/28	1.00
1981/04/29	0.85
1981/04/30	8.80
1981/05/01	4.42
1981/05/02	2.04
1981/05/03	7.20
1981/05/04	8.90
1981/05/05	4.99
1981/05/06	12.89
1981/05/07	5.53
1981/05/08	7.10
1981/05/09	8.40
1981/05/10	4.58
1981/05/11	2.25
1981/05/12	1.66
1981/05/13	1.25
1981/05/14	1.15
1981/05/15	1.05
1981/05/16	0.95
1981/05/17	0.80
1981/05/18	1.15
1981/05/19	1.42
1981/05/20	1.42
1981/05/21	1.25
1981/05/22	1.05
1981/05/23	1.20
1981/05/24	1.05
1981/05/25	12.78
1981/05/26	5.62
1981/05/27	3.09
1981/05/28	2.25
1981/05/29	1.97
1981/05/30	1.25
1981/05/31	1.25
1981/06/01	13.22
1981/06/02	2.53
1981/06/03	1.54
1981/06/04	1.66
1981/06/05	1.30
1981/06/06	1.00
1981/06/07	1.00
1981/06/08	0.76
1981/06/09	0.68
1981/06/10	0.64
1981/06/11	0.68
1981/06/12	0.64
1981/06/13	0.52
1981/06/14	0.48
1981/06/15	0.52
1981/06/16	0.68
1981/06/17	0.64
1981/06/18	0.60
1981/06/19	0.56
1981/06/20	1.30
1981/06/21	1.90
1981/06/22	4.26
1981/06/23	4.82
1981/06/24	12.23
1981/06/25	3.16
1981/06/26	1.97
1981/06/27	1.30
1981/06/28	1.15
1981/06/29	0.90
1981/06/30	0.72
1981/07/01	0.64
1981/07/02	0.60
1981/07/03	1.54
1981/07/04	1.78
1981/07/05	2.88
1981/07/06	2.11
1981/07/07	1.78
1981/07/08	2.11
1981/07/09	4.58
1981/07/10	5.08
1981/07/11	3.09
1981/07/12	2.11
1981/07/13	1.60
1981/07/14	1.15
1981/07/15	0.85
1981/07/16	4.10
1981/07/17	3.38
1981/07/18	4.99
1981/07/19	11.79
1981/07/20	19.26
1981/07/21	55.00
1981/07/22	68.20
1981/07/23	47.10
1981/07/24	11.46
1981/07/25	7.30
1981/07/26	5.17
1981/07/27	4.26
1981/07/28	3.62
1981/07/29	7.20
1981/07/30	5.80
1981/07/31	7.40
1981/08/01	6.10
1981/08/02	5.17
1981/08/03	3.70
1981/08/04	9.10
1981/08/05	59.60
1981/08/06	99.70
1981/08/07	58.40
1981/08/08	28.45
1981/08/09	15.66
1981/08/10	19.74
1981/08/11	17.82
1981/08/12	14.34
1981/08/13	11.24
1981/08/14	8.40
1981/08/15	7.10
1981/08/16	6.20
1981/08/17	5.44
1981/08/18	4.82
1981/08/19	5.17
1981/08/20	4.34
1981/08/21	3.54
1981/08/22	3.16
1981/08/23	2.88
1981/08/24	2.60
1981/08/25	11.68
1981/08/26	9.00
1981/08/27	7.40
1981/08/28	5.53
1981/08/29	3.62
1981/08/30	2.88
1981/08/31	2.67
1981/09/01	6.50
1981/09/02	6.00
1981/09/03	6.50
1981/09/04	6.80
1981/09/05	5.26
1981/09/06	4.58
1981/09/07	3.54
1981/09/08	3.16
1981/09/09	7.80
1981/09/10	6.40
1981/09/11	3.94
1981/09/12	16.02
1981/09/13	13.66
1981/09/14	10.10
1981/09/15	14.22
1981/09/16	21.14
1981/09/17	7.90
1981/09/18	5.35
1981/09/19	4.50
1981/09/20	5.44
1981/09/21	5.17
1981/09/22	4.26
1981/09/23	10.60
1981/09/24	9.90
1981/09/25	40.49
1981/09/26	10.50
1981/09/27	9.40
1981/09/28	9.40
1981/09/29	9.50
1981/09/30	11.46
1981/10/01	6.40
1981/10/02	12.23
1981/10/03	14.10
1981/10/04	8.10
1981/10/05	10.80
1981/10/06	36.80
1981/10/07	15.18
1981/10/08	8.40
1981/10/09	6.40
1981/10/10	5.26
1981/10/11	4.90
1981/10/12	4.50
1981/10/13	4.26
1981/10/14	3.78
1981/10/15	3.62
1981/10/16	6.20
1981/10/17	14.22
1981/10/18	22.44
1981/10/19	12.45
1981/10/20	9.10
1981/10/21	6.80
1981/10/22	5.80
1981/10/23	5.17
1981/10/24	4.74
1981/10/25	3.70
1981/10/26	3.46
1981/10/27	3.09
1981/10/28	3.02
1981/10/29	2.74
1981/10/30	2.60
1981/10/31	2.60
1981/11/01	2.39
1981/11/02	2.18
1981/11/03	2.39
1981/11/04	10.70
1981/11/05	34.72
1981/11/06	9.50
1981/11/07	17.70
1981/11/08	28.15
1981/11/09	14.82
1981/11/10	9.20
1981/11/11	6.90
1981/11/12	5.44
1981/11/13	4.82
1981/11/14	4.42
1981/11/15	4.50
1981/11/16	4.42
1981/11/17	4.50
1981/11/18	4.74
1981/11/19	5.62
1981/11/20	11.35
1981/11/21	5.35
1981/11/22	4.50
1981/11/23	3.94
1981/11/24	3.70
1981/11/25	3.46
1981/11/26	5.71
1981/11/27	8.00
1981/11/28	4.99
1981/11/29	4.02
1981/11/30	3.16
1981/12/01	2.81
1981/12/02	2.60
1981/12/03	2.46
1981/12/04	2.39
1981/12/05	2.32
1981/12/06	2.25
1981/12/07	2.18
1981/12/08	2.04
1981/12/09	1.90
1981/12/10	1.84
1981/12/11	1.78
1981/12/12	1.78
1981/12/13	1.78
1981/12/14	1.66
1981/12/15	1.60
1981/12/16	1.60
1981/12/17	1.54
1981/12/18	1.48
1981/12/19	1.42
1981/12/20	1.36
1981/12/21	1.30
1981/12/22	1.30
1981/12/23	1.30
1981/12/24	1.30
1981/12/25	1.25
1981/12/26	1.25
1981/12/27	1.20
1981/12/28	1.20
1981/12/29	1.15
1981/12/30	1.15
1981/12/31	1.10
#===========================================
# Number of observations = 365 / 365
# Average = 5.23