1981/01/01	1.46
1981/01/02	1.40
1981/01/03	1.35
1981/01/04	1.25
1981/01/05	1.15
1981/01/06	1.25
1981/01/07	1.20
1981/01/08	1.25
1981/01/09	1.40
1981/01/10	1.40
1981/01/11	1.15
1981/01/12	1.15
1981/01/13	1.35
1981/01/14	1.10
1981/01/15	1.05
1981/01/16	1.10
1981/01/17	1.10
1981/01/18	1.40
1981/01/19	1.20
1981/01/20	1.30
1981/01/21	1.20
1981/01/22	1.15
1981/01/23	1.05
1981/01/24	1.05
1981/01/25	1.15
1981/01/26	1.20
1981/01/27	1.20
1981/01/28	1.05
1981/01/29	1.20
1981/01/30	1.10
1981/01/31	1.05
1981/02/01	1.05
1981/02/02	1.00
1981/02/03	1.00
1981/02/04	1.00
1981/02/05	0.95
1981/02/06	0.75
1981/02/07	0.75
1981/02/08	0.75
1981/02/09	0.75
1981/02/10	1.00
1981/02/11	1.00
1981/02/12	1.30
1981/02/13	1.10
1981/02/14	0.80
1981/02/15	0.65
1981/02/16	0.70
1981/02/17	0.65
1981/02/18	0.70
1981/02/19	0.65
1981/02/20	0.70
1981/02/21	0.75
1981/02/22	0.70
1981/02/23	0.55
1981/02/24	0.45
1981/02/25	0.55
1981/02/26	0.65
1981/02/27	0.55
1981/02/28	0.45
1981/03/01	0.40
1981/03/02	0.40
1981/03/03	0.50
1981/03/04	0.36
1981/03/05	0.36
1981/03/06	0.32
1981/03/07	0.30
1981/03/08	0.34
1981/03/09	0.30
1981/03/10	0.32
1981/03/11	0.36
1981/03/12	0.34
1981/03/13	0.38
1981/03/14	0.40
1981/03/15	0.32
1981/03/16	0.28
1981/03/17	0.24
1981/03/18	0.24
1981/03/19	0.22
1981/03/20	0.22
1981/03/21	0.20
1981/03/22	0.22
1981/03/23	0.20
1981/03/24	0.22
1981/03/25	0.26
1981/03/26	0.28
1981/03/27	0.34
1981/03/28	0.36
1981/03/29	0.28
1981/03/30	0.24
1981/03/31	0.26
1981/04/01	0.30
1981/04/02	0.21
1981/04/03	0.24
1981/04/04	0.21
1981/04/05	0.15
1981/04/06	0.12
1981/04/07	0.12
1981/04/08	0.11
1981/04/09	0.11
1981/04/10	0.15
1981/04/11	0.14
1981/04/12	0.14
1981/04/13	0.15
1981/04/14	0.54
1981/04/15	0.68
1981/04/16	0.59
1981/04/17	0.36
1981/04/18	0.50
1981/04/19	0.50
1981/04/20	0.30
1981/04/21	0.27
1981/04/22	0.30
1981/04/23	0.18
1981/04/24	0.24
1981/04/25	0.21
1981/04/26	0.18
1981/04/27	0.30
1981/04/28	0.72
1981/04/29	1.12
1981/04/30	0.54
1981/05/01	0.72
1981/05/02	0.63
1981/05/03	0.59
1981/05/04	1.87
1981/05/05	2.23
1981/05/06	2.63
1981/05/07	1.23
1981/05/08	0.81
1981/05/09	1.29
1981/05/10	1.23
1981/05/11	1.07
1981/05/12	1.07
1981/05/13	1.01
1981/05/14	1.45
1981/05/15	1.34
1981/05/16	3.04
1981/05/17	2.39
1981/05/18	2.95
1981/05/19	2.95
1981/05/20	6.36
1981/05/21	4.38
1981/05/22	8.60
1981/05/23	14.84
1981/05/24	16.72
1981/05/25	13.23
1981/05/26	8.18
1981/05/27	20.50
1981/05/28	11.54
1981/05/29	9.04
1981/05/30	5.89
1981/05/31	6.12
1981/06/01	5.01
1981/06/02	18.86
1981/06/03	9.47
1981/06/04	5.78
1981/06/05	5.23
1981/06/06	3.85
1981/06/07	3.22
1981/06/08	3.31
1981/06/09	3.76
1981/06/10	5.01
1981/06/11	3.40
1981/06/12	5.12
1981/06/13	3.85
1981/06/14	5.23
1981/06/15	4.90
1981/06/16	3.76
1981/06/17	3.40
1981/06/18	6.00
1981/06/19	3.96
1981/06/20	3.76
1981/06/21	7.76
1981/06/22	5.67
1981/06/23	9.76
1981/06/24	5.23
1981/06/25	5.12
1981/06/26	4.38
1981/06/27	4.27
1981/06/28	6.24
1981/06/29	4.06
1981/06/30	3.40
1981/07/01	2.63
1981/07/02	1.87
1981/07/03	1.59
1981/07/04	1.52
1981/07/05	1.52
1981/07/06	5.56
1981/07/07	13.06
1981/07/08	7.08
1981/07/09	4.48
1981/07/10	3.49
1981/07/11	3.96
1981/07/12	5.45
1981/07/13	6.12
1981/07/14	4.06
1981/07/15	2.55
1981/07/16	2.31
1981/07/17	4.80
1981/07/18	5.45
1981/07/19	4.48
1981/07/20	4.27
1981/07/21	9.91
1981/07/22	5.34
1981/07/23	9.76
1981/07/24	5.45
1981/07/25	5.78
1981/07/26	9.18
1981/07/27	11.21
1981/07/28	11.21
1981/07/29	17.98
1981/07/30	22.70
1981/07/31	17.54
1981/08/01	19.78
1981/08/02	13.40
1981/08/03	17.54
1981/08/04	14.48
1981/08/05	11.04
1981/08/06	17.54
1981/08/07	14.12
1981/08/08	13.76
1981/08/09	9.04
1981/08/10	6.12
1981/08/11	18.86
1981/08/12	6.24
1981/08/13	16.15
1981/08/14	10.88
1981/08/15	16.53
1981/08/16	10.71
1981/08/17	6.36
1981/08/18	5.67
1981/08/19	6.48
1981/08/20	16.15
1981/08/21	29.60
1981/08/22	13.76
1981/08/23	9.76
1981/08/24	7.20
1981/08/25	5.78
1981/08/26	4.38
1981/08/27	3.85
1981/08/28	4.48
1981/08/29	7.90
1981/08/30	7.76
1981/08/31	6.12
1981/09/01	12.55
1981/09/02	12.55
1981/09/03	14.84
1981/09/04	16.91
1981/09/05	11.04
1981/09/06	11.04
1981/09/07	11.70
1981/09/08	8.46
1981/09/09	17.10
1981/09/10	14.30
1981/09/11	9.76
1981/09/12	6.60
1981/09/13	5.34
1981/09/14	4.38
1981/09/15	3.96
1981/09/16	3.67
1981/09/17	3.76
1981/09/18	3.67
1981/09/19	3.40
1981/09/20	3.58
1981/09/21	3.67
1981/09/22	4.06
1981/09/23	3.49
1981/09/24	3.40
1981/09/25	8.60
1981/09/26	5.34
1981/09/27	3.96
1981/09/28	7.08
1981/09/29	4.27
1981/09/30	3.76
1981/10/01	4.06
1981/10/02	3.67
1981/10/03	3.22
1981/10/04	3.49
1981/10/05	5.12
1981/10/06	5.23
1981/10/07	4.69
1981/10/08	7.76
1981/10/09	6.48
1981/10/10	5.01
1981/10/11	5.67
1981/10/12	5.34
1981/10/13	4.48
1981/10/14	7.48
1981/10/15	6.84
1981/10/16	5.12
1981/10/17	7.20
1981/10/18	8.18
1981/10/19	6.84
1981/10/20	5.34
1981/10/21	4.80
1981/10/22	4.27
1981/10/23	4.38
1981/10/24	4.27
1981/10/25	5.78
1981/10/26	5.23
1981/10/27	4.69
1981/10/28	4.06
1981/10/29	3.58
1981/10/30	3.49
1981/10/31	3.49
1981/11/01	3.49
1981/11/02	3.22
1981/11/03	3.31
1981/11/04	3.40
1981/11/05	3.58
1981/11/06	3.40
1981/11/07	3.85
1981/11/08	5.34
1981/11/09	13.58
1981/11/10	12.21
1981/11/11	6.72
1981/11/12	5.78
1981/11/13	5.67
1981/11/14	5.34
1981/11/15	6.24
1981/11/16	12.89
1981/11/17	25.32
1981/11/18	23.20
1981/11/19	24.20
1981/11/20	16.72
1981/11/21	9.91
1981/11/22	8.04
1981/11/23	7.08
1981/11/24	6.36
1981/11/25	5.89
1981/11/26	5.45
1981/11/27	5.23
1981/11/28	5.01
1981/11/29	5.12
1981/11/30	5.01
1981/12/01	4.80
1981/12/02	4.59
1981/12/03	4.59
1981/12/04	4.48
1981/12/05	4.38
1981/12/06	4.27
1981/12/07	4.27
1981/12/08	4.17
1981/12/09	4.06
1981/12/10	3.85
1981/12/11	4.06
1981/12/12	4.27
1981/12/13	4.38
1981/12/14	5.45
1981/12/15	8.18
1981/12/16	5.78
1981/12/17	4.90
1981/12/18	4.48
1981/12/19	4.17
1981/12/20	4.06
1981/12/21	3.96
1981/12/22	3.96
1981/12/23	3.76
1981/12/24	3.58
1981/12/25	3.49
1981/12/26	3.49
1981/12/27	3.31
1981/12/28	3.22
1981/12/29	3.04
1981/12/30	2.95
1981/12/31	2.95
#===========================================
# Number of observations = 365 / 365
# Average = 4.73