1981/01/01	0.35
1981/01/02	0.35
1981/01/03	0.35
1981/01/04	0.30
1981/01/05	0.25
1981/01/06	0.20
1981/01/07	0.18
1981/01/08	0.16
1981/01/09	0.18
1981/01/10	0.20
1981/01/11	0.18
1981/01/12	0.18
1981/01/13	0.20
1981/01/14	0.18
1981/01/15	0.16
1981/01/16	0.14
1981/01/17	0.14
1981/01/18	0.16
1981/01/19	0.30
1981/01/20	0.35
1981/01/21	0.45
1981/01/22	0.40
1981/01/23	0.30
1981/01/24	0.25
1981/01/25	0.20
1981/01/26	0.20
1981/01/27	0.20
1981/01/28	0.30
1981/01/29	0.20
1981/01/30	0.30
1981/01/31	0.40
1981/02/01	0.30
1981/02/02	0.18
1981/02/03	0.18
1981/02/04	0.18
1981/02/05	0.18
1981/02/06	0.16
1981/02/07	0.16
1981/02/08	0.16
1981/02/09	0.18
1981/02/10	0.14
1981/02/11	0.10
1981/02/12	0.06
1981/02/13	0.08
1981/02/14	0.08
1981/02/15	0.08
1981/02/16	0.08
1981/02/17	0.10
1981/02/18	0.10
1981/02/19	0.12
1981/02/20	0.12
1981/02/21	0.10
1981/02/22	0.12
1981/02/23	0.12
1981/02/24	0.12
1981/02/25	0.12
1981/02/26	0.10
1981/02/27	0.10
1981/02/28	0.12
1981/03/01	0.08
1981/03/02	0.12
1981/03/03	0.10
1981/03/04	0.10
1981/03/05	0.10
1981/03/06	0.08
1981/03/07	0.08
1981/03/08	0.12
1981/03/09	0.14
1981/03/10	0.14
1981/03/11	0.12
1981/03/12	0.14
1981/03/13	0.12
1981/03/14	0.12
1981/03/15	0.10
1981/03/16	0.10
1981/03/17	0.12
1981/03/18	0.08
1981/03/19	0.08
1981/03/20	0.08
1981/03/21	0.08
1981/03/22	0.08
1981/03/23	0.08
1981/03/24	0.08
1981/03/25	0.08
1981/03/26	0.06
1981/03/27	0.02
1981/03/28	0.02
1981/03/29	0.02
1981/03/30	0
1981/03/31	0
1981/04/01	0.10
1981/04/02	0.11
1981/04/03	0.11
1981/04/04	0.10
1981/04/05	0.10
1981/04/06	0.10
1981/04/07	0.11
1981/04/08	0.16
1981/04/09	0.19
1981/04/10	0.19
1981/04/11	0.19
1981/04/12	0.19
1981/04/13	0.19
1981/04/14	0.22
1981/04/15	0.21
1981/04/16	0.19
1981/04/17	0.17
1981/04/18	0.17
1981/04/19	0.17
1981/04/20	0.16
1981/04/21	0.16
1981/04/22	0.15
1981/04/23	0.11
1981/04/24	0.11
1981/04/25	0.10
1981/04/26	0.70
1981/04/27	0.50
1981/04/28	0.17
1981/04/29	0.16
1981/04/30	0.30
1981/05/01	0.21
1981/05/02	0.17
1981/05/03	0.19
1981/05/04	0.19
1981/05/05	0.50
1981/05/06	0.21
1981/05/07	0.16
1981/05/08	0.45
1981/05/09	0.35
1981/05/10	0.25
1981/05/11	0.22
1981/05/12	0.15
1981/05/13	0.16
1981/05/14	0.21
1981/05/15	0.21
1981/05/16	0.16
1981/05/17	0.22
1981/05/18	0.21
1981/05/19	0.19
1981/05/20	0.21
1981/05/21	0.23
1981/05/22	0.40
1981/05/23	0.35
1981/05/24	0.22
1981/05/25	0.19
1981/05/26	1.06
1981/05/27	0.50
1981/05/28	0.60
1981/05/29	1.27
1981/05/30	0.85
1981/05/31	0.60
1981/06/01	0.35
1981/06/02	0.60
1981/06/03	0.50
1981/06/04	0.45
1981/06/05	0.40
1981/06/06	0.35
1981/06/07	0.30
1981/06/08	0.25
1981/06/09	0.25
1981/06/10	0.25
1981/06/11	0.25
1981/06/12	0.30
1981/06/13	0.35
1981/06/14	0.35
1981/06/15	0.25
1981/06/16	0.30
1981/06/17	0.40
1981/06/18	0.50
1981/06/19	3.50
1981/06/20	2.14
1981/06/21	0.75
1981/06/22	0.65
1981/06/23	1.38
1981/06/24	11.16
1981/06/25	3.73
1981/06/26	2.31
1981/06/27	1.69
1981/06/28	1.80
1981/06/29	1.48
1981/06/30	1.38
1981/07/01	0.85
1981/07/02	0.65
1981/07/03	0.70
1981/07/04	3.33
1981/07/05	-9999
1981/07/06	-9999
1981/07/07	41.35
1981/07/08	13.58
1981/07/09	8.81
1981/07/10	21.76
1981/07/11	11.48
1981/07/12	9.14
1981/07/13	6.23
1981/07/14	5.12
1981/07/15	3.55
1981/07/16	3.36
1981/07/17	2.77
1981/07/18	7.49
1981/07/19	6.23
1981/07/20	4.58
1981/07/21	4.30
1981/07/22	3.55
1981/07/23	3.36
1981/07/24	6.23
1981/07/25	5.40
1981/07/26	4.85
1981/07/27	4.58
1981/07/28	5.95
1981/07/29	5.95
1981/07/30	8.48
1981/07/31	9.14
1981/08/01	7.82
1981/08/02	6.83
1981/08/03	6.83
1981/08/04	11.48
1981/08/05	24.94
1981/08/06	11.48
1981/08/07	8.48
1981/08/08	6.83
1981/08/09	5.95
1981/08/10	5.95
1981/08/11	14.00
1981/08/12	10.64
1981/08/13	7.82
1981/08/14	6.23
1981/08/15	4.58
1981/08/16	3.75
1981/08/17	3.75
1981/08/18	4.58
1981/08/19	4.85
1981/08/20	6.50
1981/08/21	4.85
1981/08/22	4.58
1981/08/23	4.85
1981/08/24	4.58
1981/08/25	4.30
1981/08/26	4.85
1981/08/27	6.23
1981/08/28	6.23
1981/08/29	4.85
1981/08/30	4.30
1981/08/31	4.85
1981/09/01	5.12
1981/09/02	12.74
1981/09/03	26.08
1981/09/04	9.47
1981/09/05	11.06
1981/09/06	27.22
1981/09/07	16.82
1981/09/08	8.81
1981/09/09	7.49
1981/09/10	11.48
1981/09/11	8.15
1981/09/12	7.82
1981/09/13	7.49
1981/09/14	7.49
1981/09/15	7.82
1981/09/16	7.49
1981/09/17	7.82
1981/09/18	7.16
1981/09/19	6.83
1981/09/20	6.50
1981/09/21	5.95
1981/09/22	5.68
1981/09/23	5.40
1981/09/24	5.12
1981/09/25	4.58
1981/09/26	4.85
1981/09/27	4.58
1981/09/28	4.30
1981/09/29	4.85
1981/09/30	4.85
1981/10/01	5.12
1981/10/02	5.40
1981/10/03	3.75
1981/10/04	5.40
1981/10/05	5.95
1981/10/06	6.23
1981/10/07	6.83
1981/10/08	6.50
1981/10/09	4.85
1981/10/10	3.55
1981/10/11	3.55
1981/10/12	4.02
1981/10/13	4.30
1981/10/14	4.30
1981/10/15	4.58
1981/10/16	4.58
1981/10/17	4.30
1981/10/18	3.75
1981/10/19	3.36
1981/10/20	3.55
1981/10/21	3.75
1981/10/22	4.02
1981/10/23	3.55
1981/10/24	3.55
1981/10/25	4.30
1981/10/26	4.30
1981/10/27	4.02
1981/10/28	3.17
1981/10/29	2.97
1981/10/30	2.77
1981/10/31	2.77
1981/11/01	2.39
1981/11/02	2.19
1981/11/03	2.19
1981/11/04	1.99
1981/11/05	1.99
1981/11/06	1.80
1981/11/07	1.69
1981/11/08	1.47
1981/11/09	1.36
1981/11/10	1.36
1981/11/11	1.25
1981/11/12	1.14
1981/11/13	1.14
1981/11/14	1.03
1981/11/15	0.92
1981/11/16	0.92
1981/11/17	0.92
1981/11/18	1.14
1981/11/19	1.03
1981/11/20	1.03
1981/11/21	0.92
1981/11/22	0.81
1981/11/23	0.70
1981/11/24	0.70
1981/11/25	0.70
1981/11/26	0.81
1981/11/27	0.70
1981/11/28	0.81
1981/11/29	0.70
1981/11/30	0.81
1981/12/01	0.65
1981/12/02	0.65
1981/12/03	0.65
1981/12/04	0.60
1981/12/05	0.65
1981/12/06	0.65
1981/12/07	0.60
1981/12/08	0.60
1981/12/09	0.65
1981/12/10	0.65
1981/12/11	0.65
1981/12/12	0.65
1981/12/13	0.65
1981/12/14	0.70
1981/12/15	0.70
1981/12/16	0.65
1981/12/17	0.65
1981/12/18	0.65
1981/12/19	0.65
1981/12/20	0.60
1981/12/21	0.60
1981/12/22	0.60
1981/12/23	0.60
1981/12/24	0.60
1981/12/25	0.60
1981/12/26	0.55
1981/12/27	0.55
1981/12/28	0.55
1981/12/29	0.55
1981/12/30	0.60
1981/12/31	0.55
#===========================================
# Number of observations = 363 / 365
# Average = 2.62