1981/01/01	0.75
1981/01/02	0.75
1981/01/03	0.75
1981/01/04	0.75
1981/01/05	0.75
1981/01/06	0.75
1981/01/07	0.75
1981/01/08	0.75
1981/01/09	0.75
1981/01/10	0.75
1981/01/11	0.75
1981/01/12	0.75
1981/01/13	0.75
1981/01/14	0.75
1981/01/15	0.75
1981/01/16	0.75
1981/01/17	0.75
1981/01/18	0.75
1981/01/19	0.75
1981/01/20	0.75
1981/01/21	0.75
1981/01/22	0.75
1981/01/23	0.75
1981/01/24	0.75
1981/01/25	0.75
1981/01/26	0.75
1981/01/27	0.75
1981/01/28	0.75
1981/01/29	0.75
1981/01/30	0.75
1981/01/31	0.75
1981/02/01	0.64
1981/02/02	0.64
1981/02/03	0.64
1981/02/04	0.64
1981/02/05	0.64
1981/02/06	0.64
1981/02/07	0.58
1981/02/08	0.58
1981/02/09	0.58
1981/02/10	0.58
1981/02/11	0.58
1981/02/12	0.58
1981/02/13	0.53
1981/02/14	0.53
1981/02/15	0.53
1981/02/16	0.53
1981/02/17	0.53
1981/02/18	0.53
1981/02/19	0.53
1981/02/20	0.53
1981/02/21	0.53
1981/02/22	0.58
1981/02/23	0.58
1981/02/24	0.58
1981/02/25	0.58
1981/02/26	0.53
1981/02/27	0.53
1981/02/28	0.53
1981/03/01	0.53
1981/03/02	0.53
1981/03/03	0.58
1981/03/04	0.58
1981/03/05	0.64
1981/03/06	0.69
1981/03/07	0.69
1981/03/08	0.69
1981/03/09	0.64
1981/03/10	0.75
1981/03/11	0.75
1981/03/12	0.75
1981/03/13	0.75
1981/03/14	0.75
1981/03/15	0.75
1981/03/16	0.69
1981/03/17	0.58
1981/03/18	0.53
1981/03/19	0.53
1981/03/20	0.53
1981/03/21	0.53
1981/03/22	0.53
1981/03/23	0.53
1981/03/24	0.64
1981/03/25	0.64
1981/03/26	0.58
1981/03/27	0.58
1981/03/28	0.53
1981/03/29	0.53
1981/03/30	0.53
1981/03/31	0.58
1981/04/01	0.60
1981/04/02	0.60
1981/04/03	0.60
1981/04/04	0.55
1981/04/05	0.55
1981/04/06	0.55
1981/04/07	0.55
1981/04/08	0.60
1981/04/09	0.60
1981/04/10	0.60
1981/04/11	0.60
1981/04/12	0.60
1981/04/13	0.60
1981/04/14	0.55
1981/04/15	0.55
1981/04/16	0.55
1981/04/17	0.55
1981/04/18	0.60
1981/04/19	0.60
1981/04/20	0.60
1981/04/21	0.60
1981/04/22	0.60
1981/04/23	0.60
1981/04/24	0.60
1981/04/25	0.60
1981/04/26	0.60
1981/04/27	0.60
1981/04/28	0.60
1981/04/29	0.60
1981/04/30	0.65
1981/05/01	0.65
1981/05/02	0.65
1981/05/03	0.60
1981/05/04	0.55
1981/05/05	0.60
1981/05/06	0.60
1981/05/07	0.55
1981/05/08	0.60
1981/05/09	0.98
1981/05/10	0.98
1981/05/11	0.80
1981/05/12	0.75
1981/05/13	0.75
1981/05/14	0.75
1981/05/15	0.70
1981/05/16	0.65
1981/05/17	0.65
1981/05/18	0.75
1981/05/19	1.25
1981/05/20	2.30
1981/05/21	1.52
1981/05/22	1.34
1981/05/23	1.43
1981/05/24	1.43
1981/05/25	1.52
1981/05/26	1.61
1981/05/27	2.18
1981/05/28	2.06
1981/05/29	1.61
1981/05/30	1.25
1981/05/31	1.07
1981/06/01	0.89
1981/06/02	0.89
1981/06/03	0.75
1981/06/04	0.75
1981/06/05	0.75
1981/06/06	0.75
1981/06/07	0.75
1981/06/08	0.75
1981/06/09	0.75
1981/06/10	0.75
1981/06/11	0.70
1981/06/12	0.70
1981/06/13	0.70
1981/06/14	2.18
1981/06/15	3.03
1981/06/16	2.66
1981/06/17	2.06
1981/06/18	1.70
1981/06/19	2.06
1981/06/20	4.36
1981/06/21	3.29
1981/06/22	2.78
1981/06/23	2.18
1981/06/24	2.42
1981/06/25	2.18
1981/06/26	1.94
1981/06/27	1.61
1981/06/28	1.43
1981/06/29	1.25
1981/06/30	1.16
1981/07/01	1.07
1981/07/02	1.25
1981/07/03	1.52
1981/07/04	1.61
1981/07/05	2.18
1981/07/06	5.00
1981/07/07	5.64
1981/07/08	3.94
1981/07/09	3.42
1981/07/10	2.78
1981/07/11	2.42
1981/07/12	2.18
1981/07/13	2.54
1981/07/14	2.42
1981/07/15	1.94
1981/07/16	1.82
1981/07/17	1.61
1981/07/18	1.52
1981/07/19	1.70
1981/07/20	1.52
1981/07/21	5.48
1981/07/22	26.24
1981/07/23	20.22
1981/07/24	8.80
1981/07/25	4.84
1981/07/26	3.03
1981/07/27	2.42
1981/07/28	2.18
1981/07/29	1.94
1981/07/30	1.70
1981/07/31	1.61
1981/08/01	1.52
1981/08/02	1.43
1981/08/03	1.43
1981/08/04	1.70
1981/08/05	2.90
1981/08/06	5.32
1981/08/07	9.82
1981/08/08	9.40
1981/08/09	9.20
1981/08/10	6.44
1981/08/11	5.32
1981/08/12	4.36
1981/08/13	3.29
1981/08/14	2.90
1981/08/15	2.54
1981/08/16	2.30
1981/08/17	2.42
1981/08/18	2.42
1981/08/19	3.29
1981/08/20	3.81
1981/08/21	9.00
1981/08/22	7.80
1981/08/23	5.80
1981/08/24	4.68
1981/08/25	4.36
1981/08/26	3.29
1981/08/27	2.78
1981/08/28	2.42
1981/08/29	2.30
1981/08/30	2.06
1981/08/31	2.42
1981/09/01	13.80
1981/09/02	8.60
1981/09/03	6.44
1981/09/04	5.00
1981/09/05	4.20
1981/09/06	3.55
1981/09/07	3.16
1981/09/08	2.78
1981/09/09	2.54
1981/09/10	2.42
1981/09/11	4.07
1981/09/12	5.32
1981/09/13	8.80
1981/09/14	8.80
1981/09/15	6.44
1981/09/16	4.84
1981/09/17	4.68
1981/09/18	4.68
1981/09/19	3.68
1981/09/20	3.55
1981/09/21	5.00
1981/09/22	5.64
1981/09/23	9.61
1981/09/24	6.60
1981/09/25	7.24
1981/09/26	7.24
1981/09/27	9.40
1981/09/28	8.80
1981/09/29	8.00
1981/09/30	6.44
1981/10/01	5.16
1981/10/02	5.64
1981/10/03	5.80
1981/10/04	7.40
1981/10/05	6.12
1981/10/06	5.16
1981/10/07	4.52
1981/10/08	3.94
1981/10/09	3.55
1981/10/10	3.29
1981/10/11	2.90
1981/10/12	2.54
1981/10/13	2.54
1981/10/14	2.42
1981/10/15	2.30
1981/10/16	3.55
1981/10/17	3.16
1981/10/18	2.90
1981/10/19	4.84
1981/10/20	5.48
1981/10/21	4.36
1981/10/22	3.68
1981/10/23	3.29
1981/10/24	3.03
1981/10/25	2.54
1981/10/26	2.42
1981/10/27	2.42
1981/10/28	2.30
1981/10/29	1.94
1981/10/30	1.94
1981/10/31	1.70
1981/11/01	1.70
1981/11/02	1.70
1981/11/03	1.70
1981/11/04	1.82
1981/11/05	2.06
1981/11/06	3.29
1981/11/07	4.52
1981/11/08	3.42
1981/11/09	2.78
1981/11/10	2.42
1981/11/11	2.06
1981/11/12	1.82
1981/11/13	1.82
1981/11/14	1.61
1981/11/15	1.52
1981/11/16	1.70
1981/11/17	1.82
1981/11/18	2.42
1981/11/19	2.06
1981/11/20	2.06
1981/11/21	2.06
1981/11/22	1.82
1981/11/23	1.94
1981/11/24	1.82
1981/11/25	1.82
1981/11/26	1.70
1981/11/27	2.06
1981/11/28	1.70
1981/11/29	1.61
1981/11/30	1.61
1981/12/01	1.52
1981/12/02	1.43
1981/12/03	1.34
1981/12/04	1.25
1981/12/05	1.25
1981/12/06	1.25
1981/12/07	1.16
1981/12/08	1.07
1981/12/09	0.89
1981/12/10	0.80
1981/12/11	0.70
1981/12/12	0.65
1981/12/13	0.65
1981/12/14	0.65
1981/12/15	0.60
1981/12/16	0.60
1981/12/17	0.55
1981/12/18	0.60
1981/12/19	0.65
1981/12/20	0.70
1981/12/21	0.80
1981/12/22	0.70
1981/12/23	0.70
1981/12/24	0.75
1981/12/25	0.80
1981/12/26	0.80
1981/12/27	0.70
1981/12/28	0.65
1981/12/29	0.70
1981/12/30	0.60
1981/12/31	0.60
#===========================================
# Number of observations = 365 / 365
# Average = 2.18