1981/01/01	0.05
1981/01/02	0.06
1981/01/03	0.05
1981/01/04	0.05
1981/01/05	0.05
1981/01/06	0.06
1981/01/07	0.05
1981/01/08	0.07
1981/01/09	0.06
1981/01/10	0.04
1981/01/11	0.06
1981/01/12	0.04
1981/01/13	0.05
1981/01/14	0.05
1981/01/15	0.05
1981/01/16	0.04
1981/01/17	0.06
1981/01/18	0.06
1981/01/19	0.06
1981/01/20	0.02
1981/01/21	0.04
1981/01/22	0.04
1981/01/23	0.04
1981/01/24	0.04
1981/01/25	0.05
1981/01/26	0.06
1981/01/27	0.06
1981/01/28	0.07
1981/01/29	0.05
1981/01/30	0.04
1981/01/31	0.04
1981/02/01	0.05
1981/02/02	0.04
1981/02/03	0.04
1981/02/04	0.05
1981/02/05	0.04
1981/02/06	0.04
1981/02/07	0.05
1981/02/08	0.04
1981/02/09	0.04
1981/02/10	0.04
1981/02/11	0.04
1981/02/12	0.05
1981/02/13	0.04
1981/02/14	0.04
1981/02/15	0.04
1981/02/16	0.04
1981/02/17	0.04
1981/02/18	0.05
1981/02/19	0.06
1981/02/20	0.05
1981/02/21	0.04
1981/02/22	0.04
1981/02/23	0.03
1981/02/24	0.04
1981/02/25	0.04
1981/02/26	0.04
1981/02/27	0.04
1981/02/28	0.04
1981/03/01	0.04
1981/03/02	0.04
1981/03/03	0.05
1981/03/04	0.04
1981/03/05	0.04
1981/03/06	0.04
1981/03/07	0.04
1981/03/08	0.04
1981/03/09	0.03
1981/03/10	0.04
1981/03/11	0.04
1981/03/12	0.04
1981/03/13	0.04
1981/03/14	0.04
1981/03/15	0.03
1981/03/16	0.04
1981/03/17	0.04
1981/03/18	0.04
1981/03/19	0.04
1981/03/20	0.04
1981/03/21	0.03
1981/03/22	0.04
1981/03/23	0.04
1981/03/24	0.04
1981/03/25	0.04
1981/03/26	0.04
1981/03/27	0.04
1981/03/28	0.04
1981/03/29	0.04
1981/03/30	0.03
1981/03/31	0.02
1981/04/01	0.08
1981/04/02	0.10
1981/04/03	0.06
1981/04/04	0.06
1981/04/05	0.08
1981/04/06	0.10
1981/04/07	0.08
1981/04/08	0.08
1981/04/09	0.06
1981/04/10	0.10
1981/04/11	0.08
1981/04/12	0.10
1981/04/13	0.06
1981/04/14	0.08
1981/04/15	0.08
1981/04/16	0.05
1981/04/17	0.06
1981/04/18	0.10
1981/04/19	0.08
1981/04/20	0.10
1981/04/21	0.08
1981/04/22	0.10
1981/04/23	0.10
1981/04/24	0.08
1981/04/25	0.06
1981/04/26	0.06
1981/04/27	0.10
1981/04/28	0.10
1981/04/29	0.13
1981/04/30	0.11
1981/05/01	0.08
1981/05/02	0.08
1981/05/03	0.10
1981/05/04	0.10
1981/05/05	0.08
1981/05/06	0.05
1981/05/07	0.05
1981/05/08	0.04
1981/05/09	0.06
1981/05/10	0.10
1981/05/11	0.11
1981/05/12	0.11
1981/05/13	0.08
1981/05/14	0.08
1981/05/15	0.08
1981/05/16	0.11
1981/05/17	0.10
1981/05/18	0.10
1981/05/19	0.08
1981/05/20	0.08
1981/05/21	0.06
1981/05/22	0.10
1981/05/23	0.13
1981/05/24	0.16
1981/05/25	0.18
1981/05/26	0.22
1981/05/27	0.16
1981/05/28	0.18
1981/05/29	0.24
1981/05/30	0.28
1981/05/31	0.24
1981/06/01	0.20
1981/06/02	0.17
1981/06/03	0.11
1981/06/04	0.08
1981/06/05	0.11
1981/06/06	0.11
1981/06/07	0.10
1981/06/08	0.13
1981/06/09	0.14
1981/06/10	0.11
1981/06/11	0.10
1981/06/12	0.11
1981/06/13	0.13
1981/06/14	0.11
1981/06/15	0.10
1981/06/16	0.11
1981/06/17	0.10
1981/06/18	0.11
1981/06/19	0.13
1981/06/20	0.16
1981/06/21	0.14
1981/06/22	0.14
1981/06/23	0.14
1981/06/24	0.13
1981/06/25	0.11
1981/06/26	0.14
1981/06/27	0.14
1981/06/28	0.17
1981/06/29	0.20
1981/06/30	0.18
1981/07/01	0.20
1981/07/02	0.17
1981/07/03	0.18
1981/07/04	0.40
1981/07/05	24.45
1981/07/06	136.30
1981/07/07	22.50
1981/07/08	9.46
1981/07/09	7.54
1981/07/10	6.50
1981/07/11	6.10
1981/07/12	5.70
1981/07/13	5.13
1981/07/14	4.45
1981/07/15	3.77
1981/07/16	3.60
1981/07/17	3.28
1981/07/18	3.60
1981/07/19	3.60
1981/07/20	3.44
1981/07/21	3.77
1981/07/22	3.60
1981/07/23	3.44
1981/07/24	3.44
1981/07/25	3.77
1981/07/26	4.28
1981/07/27	4.11
1981/07/28	3.94
1981/07/29	3.60
1981/07/30	3.94
1981/07/31	4.11
1981/08/01	4.28
1981/08/02	3.77
1981/08/03	3.60
1981/08/04	6.50
1981/08/05	7.10
1981/08/06	6.70
1981/08/07	5.90
1981/08/08	4.96
1981/08/09	4.62
1981/08/10	4.45
1981/08/11	4.11
1981/08/12	4.11
1981/08/13	3.60
1981/08/14	3.60
1981/08/15	3.44
1981/08/16	3.60
1981/08/17	3.44
1981/08/18	3.28
1981/08/19	3.12
1981/08/20	3.44
1981/08/21	3.44
1981/08/22	3.12
1981/08/23	2.80
1981/08/24	2.96
1981/08/25	2.80
1981/08/26	2.48
1981/08/27	2.32
1981/08/28	1.80
1981/08/29	1.80
1981/08/30	1.70
1981/08/31	1.50
1981/09/01	5.13
1981/09/02	6.70
1981/09/03	7.78
1981/09/04	5.90
1981/09/05	5.13
1981/09/06	5.30
1981/09/07	5.90
1981/09/08	4.62
1981/09/09	6.70
1981/09/10	5.50
1981/09/11	3.94
1981/09/12	3.60
1981/09/13	3.28
1981/09/14	3.94
1981/09/15	3.28
1981/09/16	2.64
1981/09/17	2.16
1981/09/18	1.90
1981/09/19	1.80
1981/09/20	1.60
1981/09/21	1.50
1981/09/22	1.50
1981/09/23	1.50
1981/09/24	1.50
1981/09/25	1.40
1981/09/26	1.40
1981/09/27	1.30
1981/09/28	1.40
1981/09/29	1.30
1981/09/30	1.10
1981/10/01	1.00
1981/10/02	0.93
1981/10/03	0.65
1981/10/04	0.65
1981/10/05	0.86
1981/10/06	1.10
1981/10/07	1.30
1981/10/08	1.00
1981/10/09	0.93
1981/10/10	0.79
1981/10/11	0.79
1981/10/12	0.79
1981/10/13	0.65
1981/10/14	0.65
1981/10/15	0.72
1981/10/16	0.65
1981/10/17	0.58
1981/10/18	0.58
1981/10/19	0.72
1981/10/20	0.65
1981/10/21	0.65
1981/10/22	0.58
1981/10/23	0.65
1981/10/24	0.72
1981/10/25	0.72
1981/10/26	0.58
1981/10/27	0.58
1981/10/28	0.65
1981/10/29	0.51
1981/10/30	0.51
1981/10/31	0.44
1981/11/01	0.58
1981/11/02	0.65
1981/11/03	0.58
1981/11/04	0.58
1981/11/05	0.58
1981/11/06	0.65
1981/11/07	0.58
1981/11/08	0.58
1981/11/09	0.65
1981/11/10	0.72
1981/11/11	0.72
1981/11/12	0.65
1981/11/13	0.79
1981/11/14	0.86
1981/11/15	0.93
1981/11/16	0.93
1981/11/17	0.86
1981/11/18	0.79
1981/11/19	0.79
1981/11/20	0.86
1981/11/21	0.86
1981/11/22	0.72
1981/11/23	0.65
1981/11/24	0.65
1981/11/25	0.72
1981/11/26	0.79
1981/11/27	0.93
1981/11/28	0.93
1981/11/29	0.93
1981/11/30	0.86
1981/12/01	0.79
1981/12/02	0.65
1981/12/03	0.65
1981/12/04	0.51
1981/12/05	0.44
1981/12/06	0.30
1981/12/07	0.28
1981/12/08	0.24
1981/12/09	0.20
1981/12/10	0.22
1981/12/11	0.18
1981/12/12	0.16
1981/12/13	0.12
1981/12/14	0.16
1981/12/15	0.18
1981/12/16	0.16
1981/12/17	0.16
1981/12/18	0.18
1981/12/19	0.16
1981/12/20	0.12
1981/12/21	0.16
1981/12/22	0.14
1981/12/23	0.12
1981/12/24	0.14
1981/12/25	0.16
1981/12/26	0.12
1981/12/27	0.14
1981/12/28	0.18
1981/12/29	0.20
1981/12/30	0.20
1981/12/31	0.16
#===========================================
# Number of observations = 365 / 365
# Average = 1.57