1981/01/01	0.07
1981/01/02	0.07
1981/01/03	0.07
1981/01/04	0.07
1981/01/05	0.07
1981/01/06	0.05
1981/01/07	0.05
1981/01/08	0.05
1981/01/09	0.30
1981/01/10	0.63
1981/01/11	0.69
1981/01/12	0.69
1981/01/13	0.69
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	0.87
1981/01/20	0.87
1981/01/21	0.81
1981/01/22	0.69
1981/01/23	0.57
1981/01/24	0.34
1981/01/25	0.16
1981/01/26	0.14
1981/01/27	0.16
1981/01/28	0.26
1981/01/29	0.34
1981/01/30	0.49
1981/01/31	0.41
1981/02/01	0.41
1981/02/02	0.41
1981/02/03	0.38
1981/02/04	0.30
1981/02/05	0.41
1981/02/06	0.45
1981/02/07	0.41
1981/02/08	0.53
1981/02/09	0.53
1981/02/10	0.41
1981/02/11	0.11
1981/02/12	0.26
1981/02/13	0.30
1981/02/14	0.38
1981/02/15	0.38
1981/02/16	0.07
1981/02/17	0.05
1981/02/18	0.05
1981/02/19	0.09
1981/02/20	0.13
1981/02/21	0.22
1981/02/22	0.34
1981/02/23	0.38
1981/02/24	0.38
1981/02/25	0.41
1981/02/26	0.41
1981/02/27	0.99
1981/02/28	0.99
1981/03/01	0.87
1981/03/02	0.87
1981/03/03	0.81
1981/03/04	0.63
1981/03/05	0.69
1981/03/06	0.99
1981/03/07	0.75
1981/03/08	0.49
1981/03/09	0.38
1981/03/10	0.18
1981/03/11	0.13
1981/03/12	0.05
1981/03/13	0.05
1981/03/14	0.05
1981/03/15	0.05
1981/03/16	0.05
1981/03/17	0.05
1981/03/18	0.04
1981/03/19	0.04
1981/03/20	0.04
1981/03/21	0.04
1981/03/22	0.04
1981/03/23	0.04
1981/03/24	0.02
1981/03/25	0
1981/03/26	0
1981/03/27	0
1981/03/28	0
1981/03/29	0.02
1981/03/30	0.02
1981/03/31	0.04
1981/04/01	0.07
1981/04/02	0.07
1981/04/03	0.03
1981/04/04	0.03
1981/04/05	0.03
1981/04/06	0.03
1981/04/07	0.03
1981/04/08	0.03
1981/04/09	0.03
1981/04/10	0.03
1981/04/11	0.03
1981/04/12	0.03
1981/04/13	0.03
1981/04/14	0.07
1981/04/15	0.07
1981/04/16	0.07
1981/04/17	0.07
1981/04/18	0.03
1981/04/19	0.03
1981/04/20	0.03
1981/04/21	0.03
1981/04/22	0.03
1981/04/23	0.03
1981/04/24	0.03
1981/04/25	0.17
1981/04/26	0.20
1981/04/27	0.13
1981/04/28	0.10
1981/04/29	0.10
1981/04/30	0.07
1981/05/01	0.07
1981/05/02	4.19
1981/05/03	0.10
1981/05/04	0.07
1981/05/05	2.52
1981/05/06	0.30
1981/05/07	0.54
1981/05/08	0.10
1981/05/09	0.07
1981/05/10	0.07
1981/05/11	0.13
1981/05/12	0.17
1981/05/13	0.07
1981/05/14	0.03
1981/05/15	0.03
1981/05/16	0.03
1981/05/17	0.03
1981/05/18	0.23
1981/05/19	0.51
1981/05/20	0.13
1981/05/21	0.10
1981/05/22	0.20
1981/05/23	0.10
1981/05/24	0.10
1981/05/25	0.07
1981/05/26	0.10
1981/05/27	0.10
1981/05/28	0.07
1981/05/29	0.07
1981/05/30	0.13
1981/05/31	1.14
1981/06/01	1.70
1981/06/02	0.23
1981/06/03	0.26
1981/06/04	0.20
1981/06/05	0.10
1981/06/06	0.07
1981/06/07	0.07
1981/06/08	0.07
1981/06/09	0.03
1981/06/10	0.03
1981/06/11	0.03
1981/06/12	0.03
1981/06/13	0.03
1981/06/14	0.03
1981/06/15	0.03
1981/06/16	0.03
1981/06/17	0.07
1981/06/18	0.40
1981/06/19	0.23
1981/06/20	0.13
1981/06/21	0.13
1981/06/22	0.47
1981/06/23	0.51
1981/06/24	0.80
1981/06/25	0.44
1981/06/26	0.85
1981/06/27	0.44
1981/06/28	0.40
1981/06/29	0.26
1981/06/30	0.23
1981/07/01	0.17
1981/07/02	0.13
1981/07/03	0.13
1981/07/04	0.17
1981/07/05	0.30
1981/07/06	0.61
1981/07/07	0.33
1981/07/08	0.23
1981/07/09	0.37
1981/07/10	1.20
1981/07/11	1.20
1981/07/12	0.58
1981/07/13	0.40
1981/07/14	0.33
1981/07/15	0.40
1981/07/16	0.37
1981/07/17	0.33
1981/07/18	0.26
1981/07/19	0.30
1981/07/20	0.40
1981/07/21	0.33
1981/07/22	0.51
1981/07/23	0.33
1981/07/24	0.54
1981/07/25	0.51
1981/07/26	0.44
1981/07/27	0.65
1981/07/28	0.44
1981/07/29	0.65
1981/07/30	1.09
1981/07/31	1.41
1981/08/01	2.17
1981/08/02	1.26
1981/08/03	0.97
1981/08/04	1.56
1981/08/05	2.00
1981/08/06	1.41
1981/08/07	1.09
1981/08/08	1.03
1981/08/09	0.80
1981/08/10	1.09
1981/08/11	1.03
1981/08/12	0.80
1981/08/13	1.03
1981/08/14	2.09
1981/08/15	1.20
1981/08/16	0.91
1981/08/17	0.80
1981/08/18	0.65
1981/08/19	0.61
1981/08/20	0.54
1981/08/21	0.47
1981/08/22	0.40
1981/08/23	1.09
1981/08/24	0.61
1981/08/25	0.54
1981/08/26	0.47
1981/08/27	0.47
1981/08/28	0.44
1981/08/29	0.44
1981/08/30	0.40
1981/08/31	0.40
1981/09/01	0.54
1981/09/02	0.80
1981/09/03	0.97
1981/09/04	0.61
1981/09/05	0.54
1981/09/06	0.74
1981/09/07	0.61
1981/09/08	0.51
1981/09/09	0.51
1981/09/10	0.44
1981/09/11	0.44
1981/09/12	0.40
1981/09/13	0.37
1981/09/14	0.37
1981/09/15	0.37
1981/09/16	0.33
1981/09/17	0.30
1981/09/18	0.30
1981/09/19	0.26
1981/09/20	0.33
1981/09/21	0.26
1981/09/22	0.23
1981/09/23	0.37
1981/09/24	0.33
1981/09/25	0.26
1981/09/26	0.26
1981/09/27	0.26
1981/09/28	0.26
1981/09/29	0.04
1981/09/30	0.04
1981/10/01	0.04
1981/10/02	0.03
1981/10/03	0.03
1981/10/04	0.03
1981/10/05	0.03
1981/10/06	0.03
1981/10/07	0.03
1981/10/08	0.03
1981/10/09	0.40
1981/10/10	0.06
1981/10/11	0.04
1981/10/12	0.03
1981/10/13	0.03
1981/10/14	0.03
1981/10/15	0.03
1981/10/16	0.04
1981/10/17	0.03
1981/10/18	0.03
1981/10/19	0.04
1981/10/20	0.03
1981/10/21	0.03
1981/10/22	0.03
1981/10/23	0.04
1981/10/24	0.03
1981/10/25	0.03
1981/10/26	0.03
1981/10/27	0.02
1981/10/28	0.37
1981/10/29	0.37
1981/10/30	0.37
1981/10/31	0.37
1981/11/01	0.33
1981/11/02	0.37
1981/11/03	0.44
1981/11/04	0.40
1981/11/05	0.37
1981/11/06	0.37
1981/11/07	0.37
1981/11/08	0.33
1981/11/09	0.30
1981/11/10	0.30
1981/11/11	0.33
1981/11/12	0.30
1981/11/13	0.30
1981/11/14	0.30
1981/11/15	0.30
1981/11/16	0.30
1981/11/17	0.33
1981/11/18	0.33
1981/11/19	0.30
1981/11/20	0.30
1981/11/21	0.30
1981/11/22	0.26
1981/11/23	0.26
1981/11/24	0.26
1981/11/25	0.26
1981/11/26	0.26
1981/11/27	0.22
1981/11/28	0.15
1981/11/29	0.19
1981/11/30	0.22
1981/12/01	0.22
1981/12/02	0.22
1981/12/03	0.26
1981/12/04	0.22
1981/12/05	0.22
1981/12/06	0.22
1981/12/07	0.19
1981/12/08	0.19
1981/12/09	0.19
1981/12/10	0.19
1981/12/11	0.12
1981/12/12	0.08
1981/12/13	0.08
1981/12/14	0.07
1981/12/15	0.06
1981/12/16	0.05
1981/12/17	0.05
1981/12/18	0.05
1981/12/19	0.05
1981/12/20	0.05
1981/12/21	0.05
1981/12/22	0.05
1981/12/23	0.04
1981/12/24	0.02
1981/12/25	0.02
1981/12/26	0.20
1981/12/27	0.17
1981/12/28	0.17
1981/12/29	0.10
1981/12/30	0.10
1981/12/31	0.10
#===========================================
# Number of observations = 365 / 365
# Average = 0.34