1981/01/01	0.06
1981/01/02	0.06
1981/01/03	0.06
1981/01/04	0.06
1981/01/05	0.06
1981/01/06	0.06
1981/01/07	0.06
1981/01/08	0.06
1981/01/09	0.07
1981/01/10	0.06
1981/01/11	0.06
1981/01/12	0.06
1981/01/13	0.06
1981/01/14	0.06
1981/01/15	0.06
1981/01/16	0.06
1981/01/17	0.06
1981/01/18	0.07
1981/01/19	0.08
1981/01/20	0.08
1981/01/21	0.08
1981/01/22	0.08
1981/01/23	0.08
1981/01/24	0.08
1981/01/25	0.08
1981/01/26	0.08
1981/01/27	0.07
1981/01/28	0.07
1981/01/29	0.05
1981/01/30	0.05
1981/01/31	0.05
1981/02/01	0.07
1981/02/02	0.08
1981/02/03	0.08
1981/02/04	0.07
1981/02/05	0.05
1981/02/06	0.04
1981/02/07	0.04
1981/02/08	0.04
1981/02/09	0.04
1981/02/10	0.02
1981/02/11	0.02
1981/02/12	0.02
1981/02/13	0.02
1981/02/14	0.02
1981/02/15	0.02
1981/02/16	0.02
1981/02/17	0.02
1981/02/18	0.02
1981/02/19	0.01
1981/02/20	0.01
1981/02/21	0.01
1981/02/22	0.01
1981/02/23	0.01
1981/02/24	0.01
1981/02/25	0.01
1981/02/26	0.01
1981/02/27	0.01
1981/02/28	0.01
1981/03/01	0.01
1981/03/02	0.02
1981/03/03	0.02
1981/03/04	0.02
1981/03/05	0.02
1981/03/06	0.02
1981/03/07	0.02
1981/03/08	0.02
1981/03/09	0.03
1981/03/10	0.03
1981/03/11	0.03
1981/03/12	0.03
1981/03/13	0.03
1981/03/14	0.03
1981/03/15	0.03
1981/03/16	0.04
1981/03/17	0.04
1981/03/18	0.02
1981/03/19	0.02
1981/03/20	0.02
1981/03/21	0.02
1981/03/22	0.02
1981/03/23	0.02
1981/03/24	0.02
1981/03/25	0.02
1981/03/26	0.02
1981/03/27	0.02
1981/03/28	0.02
1981/03/29	0.02
1981/03/30	0.01
1981/03/31	0.01
1981/04/01	0.08
1981/04/02	0.08
1981/04/03	0.08
1981/04/04	0.08
1981/04/05	0.08
1981/04/06	0.08
1981/04/07	0.08
1981/04/08	0.08
1981/04/09	0.08
1981/04/10	0.08
1981/04/11	0.12
1981/04/12	0.20
1981/04/13	0.32
1981/04/14	0.40
1981/04/15	0.58
1981/04/16	0.58
1981/04/17	0.67
1981/04/18	0.49
1981/04/19	0.36
1981/04/20	0.28
1981/04/21	0.32
1981/04/22	0.32
1981/04/23	0.32
1981/04/24	0.24
1981/04/25	0.24
1981/04/26	0.24
1981/04/27	0.24
1981/04/28	0.32
1981/04/29	0.28
1981/04/30	0.32
1981/05/01	0.28
1981/05/02	0.24
1981/05/03	0.28
1981/05/04	0.67
1981/05/05	1.12
1981/05/06	1.56
1981/05/07	1.21
1981/05/08	1.12
1981/05/09	0.85
1981/05/10	0.76
1981/05/11	0.67
1981/05/12	0.49
1981/05/13	0.40
1981/05/14	0.40
1981/05/15	0.49
1981/05/16	0.67
1981/05/17	2.47
1981/05/18	2.34
1981/05/19	2.34
1981/05/20	2.47
1981/05/21	2.08
1981/05/22	2.34
1981/05/23	10.10
1981/05/24	26.90
1981/05/25	11.50
1981/05/26	9.40
1981/05/27	5.50
1981/05/28	5.50
1981/05/29	4.40
1981/05/30	4.40
1981/05/31	3.86
1981/06/01	3.68
1981/06/02	3.32
1981/06/03	2.96
1981/06/04	2.60
1981/06/05	2.60
1981/06/06	2.60
1981/06/07	2.60
1981/06/08	2.47
1981/06/09	1.82
1981/06/10	1.56
1981/06/11	1.30
1981/06/12	1.12
1981/06/13	1.21
1981/06/14	1.30
1981/06/15	1.30
1981/06/16	1.30
1981/06/17	1.30
1981/06/18	1.30
1981/06/19	1.30
1981/06/20	1.30
1981/06/21	1.12
1981/06/22	0.94
1981/06/23	0.94
1981/06/24	1.12
1981/06/25	0.85
1981/06/26	0.85
1981/06/27	0.85
1981/06/28	0.85
1981/06/29	0.85
1981/06/30	0.85
1981/07/01	0.85
1981/07/02	0.76
1981/07/03	0.76
1981/07/04	0.76
1981/07/05	0.76
1981/07/06	18.76
1981/07/07	29.70
1981/07/08	6.88
1981/07/09	4.22
1981/07/10	6.60
1981/07/11	12.20
1981/07/12	7.72
1981/07/13	5.06
1981/07/14	2.60
1981/07/15	2.08
1981/07/16	2.08
1981/07/17	1.82
1981/07/18	4.22
1981/07/19	10.45
1981/07/20	6.38
1981/07/21	9.40
1981/07/22	8.28
1981/07/23	6.60
1981/07/24	11.15
1981/07/25	23.40
1981/07/26	8.84
1981/07/27	7.72
1981/07/28	8.28
1981/07/29	8.84
1981/07/30	11.85
1981/07/31	11.15
1981/08/01	7.16
1981/08/02	6.60
1981/08/03	6.60
1981/08/04	15.72
1981/08/05	11.15
1981/08/06	17.13
1981/08/07	14.78
1981/08/08	9.75
1981/08/09	7.16
1981/08/10	7.72
1981/08/11	30.40
1981/08/12	14.78
1981/08/13	9.12
1981/08/14	7.44
1981/08/15	6.60
1981/08/16	6.60
1981/08/17	7.16
1981/08/18	9.12
1981/08/19	17.60
1981/08/20	9.75
1981/08/21	7.72
1981/08/22	6.38
1981/08/23	7.72
1981/08/24	7.72
1981/08/25	7.44
1981/08/26	8.28
1981/08/27	6.16
1981/08/28	4.62
1981/08/29	4.62
1981/08/30	5.50
1981/08/31	6.16
1981/09/01	6.60
1981/09/02	6.38
1981/09/03	4.84
1981/09/04	5.28
1981/09/05	5.06
1981/09/06	6.16
1981/09/07	7.44
1981/09/08	6.60
1981/09/09	4.62
1981/09/10	5.06
1981/09/11	5.50
1981/09/12	4.40
1981/09/13	2.78
1981/09/14	2.34
1981/09/15	2.34
1981/09/16	3.14
1981/09/17	5.94
1981/09/18	4.84
1981/09/19	3.86
1981/09/20	12.55
1981/09/21	14.78
1981/09/22	10.80
1981/09/23	6.16
1981/09/24	4.40
1981/09/25	4.40
1981/09/26	4.40
1981/09/27	3.86
1981/09/28	4.04
1981/09/29	2.96
1981/09/30	2.96
1981/10/01	3.68
1981/10/02	11.50
1981/10/03	6.60
1981/10/04	6.60
1981/10/05	6.88
1981/10/06	8.00
1981/10/07	6.38
1981/10/08	5.28
1981/10/09	4.62
1981/10/10	5.72
1981/10/11	6.60
1981/10/12	6.60
1981/10/13	6.60
1981/10/14	6.60
1981/10/15	5.94
1981/10/16	5.72
1981/10/17	12.90
1981/10/18	16.66
1981/10/19	10.10
1981/10/20	9.40
1981/10/21	9.40
1981/10/22	9.12
1981/10/23	8.28
1981/10/24	8.28
1981/10/25	8.28
1981/10/26	8.56
1981/10/27	8.00
1981/10/28	6.38
1981/10/29	5.50
1981/10/30	5.50
1981/10/31	5.50
1981/11/01	5.50
1981/11/02	5.50
1981/11/03	5.06
1981/11/04	4.40
1981/11/05	4.40
1981/11/06	4.40
1981/11/07	4.40
1981/11/08	4.40
1981/11/09	4.40
1981/11/10	4.04
1981/11/11	4.04
1981/11/12	3.50
1981/11/13	3.14
1981/11/14	3.32
1981/11/15	3.68
1981/11/16	3.68
1981/11/17	48.60
1981/11/18	11.50
1981/11/19	6.88
1981/11/20	5.94
1981/11/21	5.06
1981/11/22	4.40
1981/11/23	4.04
1981/11/24	3.86
1981/11/25	3.32
1981/11/26	3.32
1981/11/27	3.32
1981/11/28	3.32
1981/11/29	3.32
1981/11/30	3.14
1981/12/01	2.47
1981/12/02	2.21
1981/12/03	1.95
1981/12/04	2.08
1981/12/05	2.08
1981/12/06	2.08
1981/12/07	2.08
1981/12/08	2.08
1981/12/09	1.95
1981/12/10	1.30
1981/12/11	2.21
1981/12/12	1.82
1981/12/13	1.82
1981/12/14	1.82
1981/12/15	1.82
1981/12/16	1.82
1981/12/17	1.82
1981/12/18	1.82
1981/12/19	1.82
1981/12/20	1.69
1981/12/21	1.56
1981/12/22	1.43
1981/12/23	1.30
1981/12/24	1.30
1981/12/25	1.21
1981/12/26	1.12
1981/12/27	1.12
1981/12/28	1.12
1981/12/29	1.12
1981/12/30	1.03
1981/12/31	0.76
#===========================================
# Number of observations = 365 / 365
# Average = 3.64