1981/01/01	5.70
1981/01/02	5.70
1981/01/03	5.70
1981/01/04	5.70
1981/01/05	3.98
1981/01/06	3.98
1981/01/07	3.98
1981/01/08	3.98
1981/01/09	3.98
1981/01/10	3.98
1981/01/11	3.98
1981/01/12	0.14
1981/01/13	0.74
1981/01/14	4.65
1981/01/15	4.65
1981/01/16	4.65
1981/01/17	4.65
1981/01/18	4.65
1981/01/19	4.65
1981/01/20	4.65
1981/01/21	4.65
1981/01/22	2.07
1981/01/23	1.02
1981/01/24	1.02
1981/01/25	1.02
1981/01/26	1.02
1981/01/27	1.02
1981/01/28	1.02
1981/01/29	1.02
1981/01/30	1.02
1981/01/31	1.02
1981/02/01	1.02
1981/02/02	1.02
1981/02/03	6.05
1981/02/04	6.05
1981/02/05	6.05
1981/02/06	6.05
1981/02/07	6.05
1981/02/08	6.05
1981/02/09	6.05
1981/02/10	6.05
1981/02/11	6.05
1981/02/12	6.05
1981/02/13	6.05
1981/02/14	6.05
1981/02/15	6.05
1981/02/16	6.05
1981/02/17	5.70
1981/02/18	5.70
1981/02/19	5.70
1981/02/20	5.35
1981/02/21	5.35
1981/02/22	5.35
1981/02/23	5.00
1981/02/24	5.00
1981/02/25	5.00
1981/02/26	5.00
1981/02/27	5.00
1981/02/28	5.00
1981/03/01	3.66
1981/03/02	3.66
1981/03/03	3.66
1981/03/04	3.66
1981/03/05	3.66
1981/03/06	3.66
1981/03/07	3.66
1981/03/08	0.08
1981/03/09	0.08
1981/03/10	0.08
1981/03/11	1.12
1981/03/12	1.12
1981/03/13	1.12
1981/03/14	1.76
1981/03/15	3.35
1981/03/16	3.35
1981/03/17	3.35
1981/03/18	3.35
1981/03/19	3.35
1981/03/20	3.35
1981/03/21	3.35
1981/03/22	3.35
1981/03/23	3.35
1981/03/24	3.35
1981/03/25	3.35
1981/03/26	3.35
1981/03/27	3.35
1981/03/28	3.35
1981/03/29	0.13
1981/03/30	0.13
1981/03/31	3.35
1981/04/01	3.35
1981/04/02	3.35
1981/04/03	3.35
1981/04/04	3.35
1981/04/05	3.35
1981/04/06	3.35
1981/04/07	3.35
1981/04/08	3.35
1981/04/09	3.35
1981/04/10	3.35
1981/04/11	3.35
1981/04/12	3.35
1981/04/13	3.35
1981/04/14	3.35
1981/04/15	3.35
1981/04/16	3.35
1981/04/17	3.35
1981/04/18	3.35
1981/04/19	3.35
1981/04/20	3.35
1981/04/21	3.35
1981/04/22	3.35
1981/04/23	3.35
1981/04/24	3.35
1981/04/25	3.35
1981/04/26	3.35
1981/04/27	3.35
1981/04/28	3.03
1981/04/29	3.03
1981/04/30	3.03
1981/05/01	3.03
1981/05/02	3.03
1981/05/03	2.71
1981/05/04	2.71
1981/05/05	2.71
1981/05/06	2.71
1981/05/07	2.71
1981/05/08	2.71
1981/05/09	2.71
1981/05/10	0.13
1981/05/11	0.11
1981/05/12	1.12
1981/05/13	0.13
1981/05/14	0.13
1981/05/15	3.66
1981/05/16	3.66
1981/05/17	3.66
1981/05/18	2.07
1981/05/19	2.07
1981/05/20	0.13
1981/05/21	0.13
1981/05/22	0.11
1981/05/23	0.11
1981/05/24	0.11
1981/05/25	0.11
1981/05/26	3.03
1981/05/27	3.03
1981/05/28	3.03
1981/05/29	3.03
1981/05/30	3.03
1981/05/31	3.03
1981/06/01	4.30
1981/06/02	3.98
1981/06/03	3.98
1981/06/04	3.98
1981/06/05	4.30
1981/06/06	4.30
1981/06/07	4.30
1981/06/08	4.30
1981/06/09	3.35
1981/06/10	2.39
1981/06/11	2.39
1981/06/12	2.39
1981/06/13	2.39
1981/06/14	2.39
1981/06/15	2.39
1981/06/16	3.98
1981/06/17	5.00
1981/06/18	5.70
1981/06/19	6.05
1981/06/20	6.05
1981/06/21	6.05
1981/06/22	6.05
1981/06/23	6.05
1981/06/24	6.05
1981/06/25	6.05
1981/06/26	6.05
1981/06/27	6.05
1981/06/28	6.05
1981/06/29	6.05
1981/06/30	6.05
1981/07/01	6.05
1981/07/02	6.05
1981/07/03	6.05
1981/07/04	6.05
1981/07/05	6.05
1981/07/06	9.20
1981/07/07	7.45
1981/07/08	13.96
1981/07/09	83.20
1981/07/10	83.20
1981/07/11	83.20
1981/07/12	83.20
1981/07/13	51.35
1981/07/14	27.00
1981/07/15	12.82
1981/07/16	8.85
1981/07/17	8.85
1981/07/18	8.85
1981/07/19	8.85
1981/07/20	8.85
1981/07/21	8.85
1981/07/22	59.15
1981/07/23	122.10
1981/07/24	122.10
1981/07/25	73.60
1981/07/26	119.25
1981/07/27	92.25
1981/07/28	80.00
1981/07/29	80.00
1981/07/30	80.00
1981/07/31	80.00
1981/08/01	62.40
1981/08/02	23.04
1981/08/03	36.75
1981/08/04	55.90
1981/08/05	55.90
1981/08/06	76.80
1981/08/07	76.80
1981/08/08	76.80
1981/08/09	76.80
1981/08/10	76.80
1981/08/11	76.80
1981/08/12	76.80
1981/08/13	60.45
1981/08/14	44.90
1981/08/15	32.00
1981/08/16	25.50
1981/08/17	18.79
1981/08/18	13.58
1981/08/19	13.58
1981/08/20	13.58
1981/08/21	13.58
1981/08/22	13.58
1981/08/23	13.58
1981/08/24	13.58
1981/08/25	13.58
1981/08/26	9.20
1981/08/27	7.10
1981/08/28	7.10
1981/08/29	7.10
1981/08/30	7.10
1981/08/31	7.10
1981/09/01	7.10
1981/09/02	7.10
1981/09/03	7.10
1981/09/04	7.10
1981/09/05	7.10
1981/09/06	7.10
1981/09/07	7.10
1981/09/08	7.10
1981/09/09	48.10
1981/09/10	77.60
1981/09/11	77.60
1981/09/12	77.60
1981/09/13	43.10
1981/09/14	26.00
1981/09/15	6.75
1981/09/16	6.75
1981/09/17	6.75
1981/09/18	6.40
1981/09/19	6.40
1981/09/20	6.40
1981/09/21	6.40
1981/09/22	6.40
1981/09/23	6.40
1981/09/24	6.40
1981/09/25	6.40
1981/09/26	6.40
1981/09/27	6.40
1981/09/28	6.40
1981/09/29	6.40
1981/09/30	6.40
1981/10/01	8.15
1981/10/02	8.15
1981/10/03	8.15
1981/10/04	8.15
1981/10/05	6.40
1981/10/06	5.70
1981/10/07	5.70
1981/10/08	5.70
1981/10/09	5.70
1981/10/10	5.70
1981/10/11	5.70
1981/10/12	5.35
1981/10/13	5.35
1981/10/14	5.35
1981/10/15	7.10
1981/10/16	23.04
1981/10/17	32.50
1981/10/18	69.20
1981/10/19	69.20
1981/10/20	69.20
1981/10/21	29.50
1981/10/22	7.80
1981/10/23	4.65
1981/10/24	5.35
1981/10/25	26.50
1981/10/26	30.00
1981/10/27	14.72
1981/10/28	38.95
1981/10/29	38.95
1981/10/30	6.75
1981/10/31	4.65
1981/11/01	4.65
1981/11/02	8.85
1981/11/03	8.85
1981/11/04	8.85
1981/11/05	8.85
1981/11/06	8.85
1981/11/07	8.85
1981/11/08	8.85
1981/11/09	8.85
1981/11/10	8.85
1981/11/11	22.56
1981/11/12	6.40
1981/11/13	9.55
1981/11/14	8.15
1981/11/15	8.15
1981/11/16	8.15
1981/11/17	41.30
1981/11/18	48.75
1981/11/19	66.40
1981/11/20	13.96
1981/11/21	13.96
1981/11/22	13.96
1981/11/23	13.96
1981/11/24	13.96
1981/11/25	13.96
1981/11/26	13.96
1981/11/27	13.58
1981/11/28	13.58
1981/11/29	10.25
1981/11/30	8.85
1981/12/01	8.85
1981/12/02	8.85
1981/12/03	6.75
1981/12/04	5.70
1981/12/05	5.70
1981/12/06	5.70
1981/12/07	5.70
1981/12/08	5.35
1981/12/09	5.35
1981/12/10	5.35
1981/12/11	5.35
1981/12/12	6.05
1981/12/13	6.05
1981/12/14	6.05
1981/12/15	6.05
1981/12/16	6.05
1981/12/17	0.64
1981/12/18	0.08
1981/12/19	5.35
1981/12/20	5.35
1981/12/21	5.35
1981/12/22	5.35
1981/12/23	5.35
1981/12/24	5.00
1981/12/25	5.00
1981/12/26	5.00
1981/12/27	5.00
1981/12/28	5.00
1981/12/29	0.83
1981/12/30	4.65
1981/12/31	4.65
#===========================================
# Number of observations = 365 / 365
# Average = 13.34