1981/01/01	0.70
1981/01/02	0.60
1981/01/03	0.38
1981/01/04	0.29
1981/01/05	0.32
1981/01/06	0.32
1981/01/07	0.35
1981/01/08	0.41
1981/01/09	0.35
1981/01/10	0.26
1981/01/11	0.26
1981/01/12	0.26
1981/01/13	0.23
1981/01/14	0.35
1981/01/15	0.38
1981/01/16	0.35
1981/01/17	0.29
1981/01/18	0.29
1981/01/19	0.26
1981/01/20	0.18
1981/01/21	0.41
1981/01/22	0.50
1981/01/23	0.41
1981/01/24	0.41
1981/01/25	0.18
1981/01/26	0.18
1981/01/27	0.14
1981/01/28	0.18
1981/01/29	0.44
1981/01/30	0.55
1981/01/31	0.41
1981/02/01	0.20
1981/02/02	0.16
1981/02/03	0.14
1981/02/04	0.14
1981/02/05	0.18
1981/02/06	0.55
1981/02/07	0.65
1981/02/08	0.47
1981/02/09	0.20
1981/02/10	0.18
1981/02/11	0.14
1981/02/12	0.10
1981/02/13	0.10
1981/02/14	0.10
1981/02/15	0.10
1981/02/16	0.08
1981/02/17	0.10
1981/02/18	0.41
1981/02/19	0.18
1981/02/20	0.38
1981/02/21	0.35
1981/02/22	0.38
1981/02/23	0.20
1981/02/24	0.50
1981/02/25	0.16
1981/02/26	0.08
1981/02/27	0.12
1981/02/28	0.12
1981/03/01	0.14
1981/03/02	0.14
1981/03/03	0.16
1981/03/04	0.55
1981/03/05	0.65
1981/03/06	0.50
1981/03/07	0.55
1981/03/08	0.55
1981/03/09	0.38
1981/03/10	0.14
1981/03/11	0.16
1981/03/12	0.18
1981/03/13	0.20
1981/03/14	0.16
1981/03/15	0.18
1981/03/16	0.20
1981/03/17	0.16
1981/03/18	0.20
1981/03/19	0.55
1981/03/20	0.85
1981/03/21	2.00
1981/03/22	2.49
1981/03/23	3.34
1981/03/24	3.42
1981/03/25	3.26
1981/03/26	3.26
1981/03/27	3.18
1981/03/28	3.60
1981/03/29	3.34
1981/03/30	3.34
1981/03/31	3.50
1981/04/01	3.47
1981/04/02	3.18
1981/04/03	3.47
1981/04/04	3.30
1981/04/05	2.70
1981/04/06	2.82
1981/04/07	2.22
1981/04/08	1.46
1981/04/09	0.82
1981/04/10	0.82
1981/04/11	0.66
1981/04/12	0.58
1981/04/13	0.90
1981/04/14	2.94
1981/04/15	2.34
1981/04/16	2.02
1981/04/17	2.10
1981/04/18	2.22
1981/04/19	2.02
1981/04/20	1.94
1981/04/21	1.86
1981/04/22	1.78
1981/04/23	1.70
1981/04/24	1.46
1981/04/25	1.14
1981/04/26	2.34
1981/04/27	2.46
1981/04/28	1.94
1981/04/29	1.54
1981/04/30	1.94
1981/05/01	2.02
1981/05/02	1.86
1981/05/03	2.22
1981/05/04	1.94
1981/05/05	2.10
1981/05/06	2.10
1981/05/07	2.02
1981/05/08	2.22
1981/05/09	2.02
1981/05/10	2.02
1981/05/11	2.02
1981/05/12	2.02
1981/05/13	1.94
1981/05/14	2.10
1981/05/15	3.18
1981/05/16	2.34
1981/05/17	2.34
1981/05/18	4.32
1981/05/19	3.64
1981/05/20	3.06
1981/05/21	7.38
1981/05/22	2.82
1981/05/23	1.70
1981/05/24	0.82
1981/05/25	0.41
1981/05/26	0.47
1981/05/27	0.29
1981/05/28	0.32
1981/05/29	0.66
1981/05/30	0.38
1981/05/31	0.26
1981/06/01	0.32
1981/06/02	0.98
1981/06/03	1.54
1981/06/04	0.50
1981/06/05	0.38
1981/06/06	0.26
1981/06/07	0.18
1981/06/08	0.16
1981/06/09	0.18
1981/06/10	0.18
1981/06/11	0.16
1981/06/12	0.16
1981/06/13	0.16
1981/06/14	0.18
1981/06/15	0.20
1981/06/16	0.23
1981/06/17	0.74
1981/06/18	0.41
1981/06/19	2.02
1981/06/20	2.22
1981/06/21	2.94
1981/06/22	3.64
1981/06/23	19.06
1981/06/24	27.88
1981/06/25	17.92
1981/06/26	13.88
1981/06/27	10.77
1981/06/28	10.48
1981/06/29	1.22
1981/06/30	7.66
1981/07/01	6.26
1981/07/02	5.63
1981/07/03	6.47
1981/07/04	16.40
1981/07/05	-9999
1981/07/06	140.40
1981/07/07	145.13
1981/07/08	49.95
1981/07/09	79.85
1981/07/10	62.94
1981/07/11	33.80
1981/07/12	23.15
1981/07/13	25.46
1981/07/14	17.41
1981/07/15	14.26
1981/07/16	13.63
1981/07/17	13.00
1981/07/18	32.10
1981/07/19	23.15
1981/07/20	22.38
1981/07/21	23.92
1981/07/22	23.15
1981/07/23	17.41
1981/07/24	22.38
1981/07/25	18.04
1981/07/26	16.78
1981/07/27	14.89
1981/07/28	16.15
1981/07/29	20.07
1981/07/30	34.65
1981/07/31	29.55
1981/08/01	20.84
1981/08/02	16.78
1981/08/03	16.15
1981/08/04	31.25
1981/08/05	43.87
1981/08/06	22.38
1981/08/07	22.38
1981/08/08	18.67
1981/08/09	15.52
1981/08/10	149.85
1981/08/11	23.92
1981/08/12	21.61
1981/08/13	15.52
1981/08/14	13.00
1981/08/15	25.46
1981/08/16	18.67
1981/08/17	16.78
1981/08/18	15.52
1981/08/19	14.26
1981/08/20	18.04
1981/08/21	14.26
1981/08/22	11.44
1981/08/23	9.88
1981/08/24	9.88
1981/08/25	8.32
1981/08/26	7.80
1981/08/27	64.06
1981/08/28	16.78
1981/08/29	11.96
1981/08/30	9.88
1981/08/31	9.88
1981/09/01	10.40
1981/09/02	9.88
1981/09/03	11.44
1981/09/04	22.38
1981/09/05	23.92
1981/09/06	20.07
1981/09/07	22.38
1981/09/08	17.41
1981/09/09	14.26
1981/09/10	16.15
1981/09/11	11.44
1981/09/12	9.36
1981/09/13	7.80
1981/09/14	7.00
1981/09/15	7.40
1981/09/16	7.80
1981/09/17	7.00
1981/09/18	6.60
1981/09/19	6.20
1981/09/20	5.80
1981/09/21	4.60
1981/09/22	4.20
1981/09/23	4.20
1981/09/24	3.36
1981/09/25	3.58
1981/09/26	3.36
1981/09/27	3.58
1981/09/28	5.40
1981/09/29	4.20
1981/09/30	4.60
1981/10/01	3.80
1981/10/02	3.58
1981/10/03	10.40
1981/10/04	6.60
1981/10/05	18.67
1981/10/06	29.55
1981/10/07	20.07
1981/10/08	19.30
1981/10/09	18.04
1981/10/10	16.78
1981/10/11	14.26
1981/10/12	14.89
1981/10/13	11.96
1981/10/14	10.92
1981/10/15	9.88
1981/10/16	8.84
1981/10/17	9.36
1981/10/18	9.36
1981/10/19	9.36
1981/10/20	9.88
1981/10/21	19.30
1981/10/22	18.67
1981/10/23	31.25
1981/10/24	37.36
1981/10/25	41.08
1981/10/26	44.80
1981/10/27	37.36
1981/10/28	32.10
1981/10/29	27.85
1981/10/30	25.46
1981/10/31	24.69
1981/11/01	23.15
1981/11/02	20.07
1981/11/03	18.04
1981/11/04	16.78
1981/11/05	14.89
1981/11/06	14.26
1981/11/07	13.63
1981/11/08	12.48
1981/11/09	12.48
1981/11/10	10.92
1981/11/11	9.36
1981/11/12	9.36
1981/11/13	9.36
1981/11/14	10.40
1981/11/15	11.44
1981/11/16	8.84
1981/11/17	8.84
1981/11/18	13.63
1981/11/19	7.80
1981/11/20	8.32
1981/11/21	8.32
1981/11/22	9.36
1981/11/23	9.88
1981/11/24	6.60
1981/11/25	7.00
1981/11/26	5.40
1981/11/27	5.00
1981/11/28	3.14
1981/11/29	2.70
1981/11/30	2.26
1981/12/01	1.38
1981/12/02	1.49
1981/12/03	1.49
1981/12/04	1.49
1981/12/05	1.82
1981/12/06	1.60
1981/12/07	1.38
1981/12/08	1.16
1981/12/09	1.27
1981/12/10	1.05
1981/12/11	1.05
1981/12/12	1.05
1981/12/13	1.05
1981/12/14	1.16
1981/12/15	1.16
1981/12/16	1.05
1981/12/17	0.72
1981/12/18	0.83
1981/12/19	0.83
1981/12/20	0.61
1981/12/21	0.61
1981/12/22	0.83
1981/12/23	0.61
1981/12/24	0.50
1981/12/25	0.47
1981/12/26	0.41
1981/12/27	0.41
1981/12/28	0.38
1981/12/29	0.38
1981/12/30	0.38
1981/12/31	0.38
#===========================================
# Number of observations = 364 / 365
# Average = 8.83