1981/01/01	0.54
1981/01/02	0.54
1981/01/03	0.54
1981/01/04	0.54
1981/01/05	0.54
1981/01/06	0.54
1981/01/07	0.54
1981/01/08	0.45
1981/01/09	0.45
1981/01/10	0.45
1981/01/11	0.45
1981/01/12	0.45
1981/01/13	0.45
1981/01/14	0.45
1981/01/15	0.45
1981/01/16	0.45
1981/01/17	0.42
1981/01/18	0.42
1981/01/19	0.42
1981/01/20	0.42
1981/01/21	0.42
1981/01/22	0.42
1981/01/23	0.42
1981/01/24	0.42
1981/01/25	0.42
1981/01/26	0.42
1981/01/27	0.42
1981/01/28	0.38
1981/01/29	0.38
1981/01/30	0.38
1981/01/31	0.38
1981/02/01	0.38
1981/02/02	0.38
1981/02/03	0.38
1981/02/04	0.38
1981/02/05	0.38
1981/02/06	0.38
1981/02/07	0.38
1981/02/08	0.38
1981/02/09	0.38
1981/02/10	0.38
1981/02/11	0.38
1981/02/12	0.38
1981/02/13	0.38
1981/02/14	0.38
1981/02/15	0.35
1981/02/16	0.35
1981/02/17	0.31
1981/02/18	0.31
1981/02/19	0.31
1981/02/20	0.31
1981/02/21	0.31
1981/02/22	0.31
1981/02/23	0.31
1981/02/24	0.31
1981/02/25	0.31
1981/02/26	0.31
1981/02/27	0.38
1981/02/28	0.42
1981/03/01	0.38
1981/03/02	0.35
1981/03/03	0.31
1981/03/04	0.31
1981/03/05	0.31
1981/03/06	0.31
1981/03/07	0.38
1981/03/08	0.35
1981/03/09	0.31
1981/03/10	0.35
1981/03/11	0.35
1981/03/12	0.38
1981/03/13	0.35
1981/03/14	0.31
1981/03/15	0.31
1981/03/16	0.28
1981/03/17	0.28
1981/03/18	0.28
1981/03/19	0.28
1981/03/20	0.28
1981/03/21	0.28
1981/03/22	0.24
1981/03/23	0.24
1981/03/24	0.24
1981/03/25	0.24
1981/03/26	0.24
1981/03/27	0.24
1981/03/28	0.24
1981/03/29	0.24
1981/03/30	0.24
1981/03/31	0.24
1981/04/01	0.45
1981/04/02	0.63
1981/04/03	0.45
1981/04/04	0.36
1981/04/05	0.36
1981/04/06	0.27
1981/04/07	0.27
1981/04/08	0.27
1981/04/09	0.18
1981/04/10	0.45
1981/04/11	0.36
1981/04/12	0.27
1981/04/13	3.26
1981/04/14	2.78
1981/04/15	1.32
1981/04/16	1.04
1981/04/17	0.90
1981/04/18	1.04
1981/04/19	0.81
1981/04/20	0.54
1981/04/21	0.45
1981/04/22	0.36
1981/04/23	0.36
1981/04/24	0.27
1981/04/25	0.27
1981/04/26	0.81
1981/04/27	0.54
1981/04/28	0.54
1981/04/29	0.54
1981/04/30	0.63
1981/05/01	0.45
1981/05/02	0.36
1981/05/03	6.72
1981/05/04	3.26
1981/05/05	4.09
1981/05/06	2.94
1981/05/07	1.88
1981/05/08	2.78
1981/05/09	2.62
1981/05/10	1.46
1981/05/11	1.04
1981/05/12	0.90
1981/05/13	0.72
1981/05/14	0.54
1981/05/15	0.54
1981/05/16	0.45
1981/05/17	0.54
1981/05/18	1.88
1981/05/19	3.74
1981/05/20	2.94
1981/05/21	2.46
1981/05/22	19.20
1981/05/23	26.14
1981/05/24	14.40
1981/05/25	5.80
1981/05/26	3.58
1981/05/27	2.78
1981/05/28	2.16
1981/05/29	2.02
1981/05/30	2.02
1981/05/31	2.02
1981/06/01	1.88
1981/06/02	1.74
1981/06/03	2.78
1981/06/04	3.74
1981/06/05	2.62
1981/06/06	2.02
1981/06/07	1.74
1981/06/08	1.74
1981/06/09	1.60
1981/06/10	1.46
1981/06/11	1.32
1981/06/12	1.18
1981/06/13	1.18
1981/06/14	1.04
1981/06/15	1.18
1981/06/16	1.18
1981/06/17	1.18
1981/06/18	1.46
1981/06/19	1.32
1981/06/20	1.04
1981/06/21	1.32
1981/06/22	1.46
1981/06/23	1.46
1981/06/24	2.46
1981/06/25	2.78
1981/06/26	2.78
1981/06/27	3.74
1981/06/28	3.10
1981/06/29	2.46
1981/06/30	2.02
1981/07/01	1.74
1981/07/02	1.46
1981/07/03	1.32
1981/07/04	1.18
1981/07/05	1.88
1981/07/06	37.60
1981/07/07	32.14
1981/07/08	10.42
1981/07/09	6.49
1981/07/10	8.10
1981/07/11	5.61
1981/07/12	4.47
1981/07/13	3.42
1981/07/14	2.78
1981/07/15	2.94
1981/07/16	5.80
1981/07/17	5.61
1981/07/18	3.90
1981/07/19	26.14
1981/07/20	24.92
1981/07/21	12.02
1981/07/22	50.18
1981/07/23	19.63
1981/07/24	11.51
1981/07/25	14.16
1981/07/26	11.83
1981/07/27	12.46
1981/07/28	16.44
1981/07/29	11.83
1981/07/30	12.46
1981/07/31	19.22
1981/08/01	12.77
1981/08/02	15.68
1981/08/03	13.09
1981/08/04	16.06
1981/08/05	23.05
1981/08/06	28.22
1981/08/07	18.82
1981/08/08	13.78
1981/08/09	10.56
1981/08/10	9.09
1981/08/11	8.22
1981/08/12	7.10
1981/08/13	6.33
1981/08/14	6.07
1981/08/15	5.05
1981/08/16	4.36
1981/08/17	4.14
1981/08/18	3.70
1981/08/19	3.48
1981/08/20	3.70
1981/08/21	4.14
1981/08/22	3.70
1981/08/23	3.04
1981/08/24	3.04
1981/08/25	2.82
1981/08/26	2.43
1981/08/27	2.43
1981/08/28	2.60
1981/08/29	3.48
1981/08/30	3.48
1981/08/31	3.48
1981/09/01	3.70
1981/09/02	5.82
1981/09/03	10.56
1981/09/04	7.93
1981/09/05	10.56
1981/09/06	8.80
1981/09/07	9.38
1981/09/08	7.64
1981/09/09	6.07
1981/09/10	5.05
1981/09/11	7.10
1981/09/12	6.58
1981/09/13	5.31
1981/09/14	4.80
1981/09/15	4.14
1981/09/16	3.92
1981/09/17	3.70
1981/09/18	4.58
1981/09/19	4.36
1981/09/20	3.70
1981/09/21	3.26
1981/09/22	2.82
1981/09/23	5.56
1981/09/24	5.31
1981/09/25	7.10
1981/09/26	6.84
1981/09/27	5.56
1981/09/28	5.56
1981/09/29	5.05
1981/09/30	4.36
1981/10/01	4.36
1981/10/02	6.58
1981/10/03	4.58
1981/10/04	4.14
1981/10/05	5.31
1981/10/06	4.58
1981/10/07	4.36
1981/10/08	6.07
1981/10/09	4.80
1981/10/10	6.07
1981/10/11	9.96
1981/10/12	6.07
1981/10/13	5.05
1981/10/14	4.36
1981/10/15	4.14
1981/10/16	4.80
1981/10/17	5.56
1981/10/18	5.05
1981/10/19	6.07
1981/10/20	5.82
1981/10/21	5.31
1981/10/22	4.80
1981/10/23	5.31
1981/10/24	5.56
1981/10/25	4.14
1981/10/26	3.92
1981/10/27	3.48
1981/10/28	3.26
1981/10/29	3.04
1981/10/30	3.04
1981/10/31	2.82
1981/11/01	2.60
1981/11/02	2.60
1981/11/03	2.60
1981/11/04	4.80
1981/11/05	6.84
1981/11/06	4.58
1981/11/07	4.14
1981/11/08	3.48
1981/11/09	3.26
1981/11/10	3.04
1981/11/11	2.82
1981/11/12	2.82
1981/11/13	2.82
1981/11/14	2.82
1981/11/15	2.82
1981/11/16	2.82
1981/11/17	4.14
1981/11/18	3.92
1981/11/19	3.04
1981/11/20	2.82
1981/11/21	2.60
1981/11/22	2.60
1981/11/23	2.60
1981/11/24	2.43
1981/11/25	2.43
1981/11/26	2.60
1981/11/27	2.43
1981/11/28	2.43
1981/11/29	2.26
1981/11/30	2.26
1981/12/01	2.09
1981/12/02	2.09
1981/12/03	1.92
1981/12/04	1.92
1981/12/05	1.92
1981/12/06	1.92
1981/12/07	1.92
1981/12/08	1.92
1981/12/09	1.92
1981/12/10	1.92
1981/12/11	1.92
1981/12/12	2.09
1981/12/13	1.92
1981/12/14	1.92
1981/12/15	1.75
1981/12/16	1.75
1981/12/17	1.75
1981/12/18	1.75
1981/12/19	1.75
1981/12/20	1.58
1981/12/21	1.58
1981/12/22	1.58
1981/12/23	1.58
1981/12/24	1.58
1981/12/25	1.58
1981/12/26	1.58
1981/12/27	1.58
1981/12/28	1.58
1981/12/29	1.58
1981/12/30	1.41
1981/12/31	1.41
#===========================================
# Number of observations = 365 / 365
# Average = 3.66