1981/01/01	0.33
1981/01/02	0.33
1981/01/03	0.33
1981/01/04	0.28
1981/01/05	0.23
1981/01/06	0.23
1981/01/07	0.23
1981/01/08	0.23
1981/01/09	0.23
1981/01/10	0.23
1981/01/11	0.23
1981/01/12	0.23
1981/01/13	0.23
1981/01/14	0.23
1981/01/15	0.23
1981/01/16	0.19
1981/01/17	0.19
1981/01/18	0.19
1981/01/19	0.19
1981/01/20	0.19
1981/01/21	0.19
1981/01/22	0.19
1981/01/23	0.19
1981/01/24	0.19
1981/01/25	0.19
1981/01/26	0.19
1981/01/27	0.19
1981/01/28	0.19
1981/01/29	0.19
1981/01/30	0.19
1981/01/31	0.14
1981/02/01	0.14
1981/02/02	0.14
1981/02/03	0.14
1981/02/04	0.14
1981/02/05	0.14
1981/02/06	0.14
1981/02/07	0.14
1981/02/08	0.14
1981/02/09	0.14
1981/02/10	0.14
1981/02/11	0.14
1981/02/12	0.10
1981/02/13	0.10
1981/02/14	0.10
1981/02/15	0.09
1981/02/16	0.09
1981/02/17	0.09
1981/02/18	0.09
1981/02/19	0.09
1981/02/20	0.09
1981/02/21	0.09
1981/02/22	0.09
1981/02/23	0.09
1981/02/24	0.09
1981/02/25	0.09
1981/02/26	0.14
1981/02/27	0.23
1981/02/28	0.33
1981/03/01	0.23
1981/03/02	0.23
1981/03/03	0.19
1981/03/04	0.19
1981/03/05	0.19
1981/03/06	0.19
1981/03/07	0.19
1981/03/08	0.19
1981/03/09	0.14
1981/03/10	0.50
1981/03/11	0.46
1981/03/12	0.46
1981/03/13	0.41
1981/03/14	0.64
1981/03/15	0.87
1981/03/16	0.41
1981/03/17	0.23
1981/03/18	0.23
1981/03/19	0.19
1981/03/20	0.14
1981/03/21	0.10
1981/03/22	0.10
1981/03/23	0.09
1981/03/24	0.09
1981/03/25	0.09
1981/03/26	0.09
1981/03/27	0.09
1981/03/28	0.09
1981/03/29	0.09
1981/03/30	0.09
1981/03/31	0.28
1981/04/01	0.65
1981/04/02	0.70
1981/04/03	0.70
1981/04/04	0.45
1981/04/05	0.65
1981/04/06	0.80
1981/04/07	0.85
1981/04/08	0.35
1981/04/09	0.30
1981/04/10	0.20
1981/04/11	0.20
1981/04/12	0.15
1981/04/13	0.20
1981/04/14	0.20
1981/04/15	0.20
1981/04/16	0.15
1981/04/17	0.15
1981/04/18	0.15
1981/04/19	0.15
1981/04/20	0.15
1981/04/21	0.15
1981/04/22	0.15
1981/04/23	0.10
1981/04/24	0.10
1981/04/25	0.10
1981/04/26	0.10
1981/04/27	0.05
1981/04/28	0.05
1981/04/29	0.05
1981/04/30	0.05
1981/05/01	0.10
1981/05/02	0.20
1981/05/03	0.85
1981/05/04	1.20
1981/05/05	2.60
1981/05/06	27.90
1981/05/07	12.00
1981/05/08	1.50
1981/05/09	2.00
1981/05/10	1.30
1981/05/11	0.95
1981/05/12	0.70
1981/05/13	0.65
1981/05/14	0.40
1981/05/15	0.15
1981/05/16	0.20
1981/05/17	35.30
1981/05/18	54.50
1981/05/19	7.95
1981/05/20	2.60
1981/05/21	1.30
1981/05/22	0.70
1981/05/23	0.40
1981/05/24	0.35
1981/05/25	0.40
1981/05/26	0.30
1981/05/27	0.30
1981/05/28	0.30
1981/05/29	0.30
1981/05/30	0.30
1981/05/31	0.40
1981/06/01	0.60
1981/06/02	1.80
1981/06/03	1.00
1981/06/04	0.75
1981/06/05	0.60
1981/06/06	0.40
1981/06/07	0.30
1981/06/08	0.25
1981/06/09	0.25
1981/06/10	0.20
1981/06/11	0.10
1981/06/12	0
1981/06/13	0
1981/06/14	0
1981/06/15	0
1981/06/16	0
1981/06/17	0
1981/06/18	0.20
1981/06/19	0
1981/06/20	4.50
1981/06/21	1.60
1981/06/22	12.20
1981/06/23	17.00
1981/06/24	6.00
1981/06/25	3.30
1981/06/26	2.90
1981/06/27	2.60
1981/06/28	4.35
1981/06/29	3.15
1981/06/30	1.70
1981/07/01	1.20
1981/07/02	0.85
1981/07/03	0.75
1981/07/04	0.65
1981/07/05	0.70
1981/07/06	1.00
1981/07/07	2.80
1981/07/08	2.30
1981/07/09	1.80
1981/07/10	7.65
1981/07/11	7.95
1981/07/12	4.20
1981/07/13	2.30
1981/07/14	1.50
1981/07/15	1.30
1981/07/16	1.40
1981/07/17	2.30
1981/07/18	7.20
1981/07/19	5.25
1981/07/20	5.25
1981/07/21	36.90
1981/07/22	36.50
1981/07/23	15.75
1981/07/24	8.40
1981/07/25	6.00
1981/07/26	4.80
1981/07/27	4.05
1981/07/28	4.65
1981/07/29	4.80
1981/07/30	4.95
1981/07/31	12.40
1981/08/01	33.77
1981/08/02	13.80
1981/08/03	8.70
1981/08/04	16.50
1981/08/05	43.85
1981/08/06	21.70
1981/08/07	13.40
1981/08/08	24.97
1981/08/09	7.95
1981/08/10	7.35
1981/08/11	9.20
1981/08/12	8.25
1981/08/13	10.60
1981/08/14	12.00
1981/08/15	10.00
1981/08/16	7.50
1981/08/17	6.30
1981/08/18	5.70
1981/08/19	5.10
1981/08/20	10.00
1981/08/21	7.95
1981/08/22	6.15
1981/08/23	6.45
1981/08/24	6.60
1981/08/25	5.10
1981/08/26	4.35
1981/08/27	3.60
1981/08/28	3.30
1981/08/29	3.15
1981/08/30	8.25
1981/08/31	7.50
1981/09/01	7.50
1981/09/02	45.65
1981/09/03	75.06
1981/09/04	25.33
1981/09/05	17.00
1981/09/06	12.20
1981/09/07	9.20
1981/09/08	7.80
1981/09/09	8.25
1981/09/10	16.25
1981/09/11	9.20
1981/09/12	7.95
1981/09/13	9.20
1981/09/14	7.65
1981/09/15	6.90
1981/09/16	5.55
1981/09/17	4.95
1981/09/18	4.65
1981/09/19	4.95
1981/09/20	5.10
1981/09/21	4.80
1981/09/22	4.20
1981/09/23	5.25
1981/09/24	42.10
1981/09/25	14.80
1981/09/26	10.00
1981/09/27	11.00
1981/09/28	14.40
1981/09/29	8.70
1981/09/30	8.70
1981/10/01	7.20
1981/10/02	7.50
1981/10/03	7.65
1981/10/04	6.90
1981/10/05	8.10
1981/10/06	13.60
1981/10/07	7.50
1981/10/08	7.05
1981/10/09	6.45
1981/10/10	5.55
1981/10/11	5.10
1981/10/12	4.35
1981/10/13	4.05
1981/10/14	3.90
1981/10/15	4.05
1981/10/16	6.00
1981/10/17	8.85
1981/10/18	9.80
1981/10/19	6.90
1981/10/20	5.70
1981/10/21	4.95
1981/10/22	4.50
1981/10/23	4.20
1981/10/24	3.90
1981/10/25	3.60
1981/10/26	3.30
1981/10/27	3.00
1981/10/28	2.90
1981/10/29	2.90
1981/10/30	3.00
1981/10/31	3.00
1981/11/01	3.30
1981/11/02	3.30
1981/11/03	4.20
1981/11/04	5.10
1981/11/05	4.50
1981/11/06	3.90
1981/11/07	3.60
1981/11/08	3.60
1981/11/09	3.75
1981/11/10	3.45
1981/11/11	3.30
1981/11/12	3.30
1981/11/13	3.30
1981/11/14	3.15
1981/11/15	3.15
1981/11/16	3.15
1981/11/17	3.15
1981/11/18	3.00
1981/11/19	3.00
1981/11/20	3.00
1981/11/21	2.90
1981/11/22	2.90
1981/11/23	2.90
1981/11/24	4.35
1981/11/25	2.90
1981/11/26	2.80
1981/11/27	2.60
1981/11/28	2.50
1981/11/29	2.50
1981/11/30	2.50
1981/12/01	2.40
1981/12/02	2.40
1981/12/03	2.30
1981/12/04	2.30
1981/12/05	2.30
1981/12/06	2.20
1981/12/07	2.20
1981/12/08	2.10
1981/12/09	2.10
1981/12/10	2.00
1981/12/11	2.00
1981/12/12	1.90
1981/12/13	1.90
1981/12/14	1.80
1981/12/15	1.80
1981/12/16	1.70
1981/12/17	1.70
1981/12/18	1.70
1981/12/19	1.70
1981/12/20	1.70
1981/12/21	1.70
1981/12/22	1.70
1981/12/23	1.70
1981/12/24	1.70
1981/12/25	1.70
1981/12/26	1.70
1981/12/27	1.70
1981/12/28	1.60
1981/12/29	1.60
1981/12/30	1.60
1981/12/31	1.60
#===========================================
# Number of observations = 365 / 365
# Average = 4.20