1981/01/01	5.20
1981/01/02	4.80
1981/01/03	5.20
1981/01/04	4.80
1981/01/05	4.80
1981/01/06	4.80
1981/01/07	4.40
1981/01/08	4.80
1981/01/09	4.80
1981/01/10	4.80
1981/01/11	4.80
1981/01/12	4.80
1981/01/13	4.80
1981/01/14	4.80
1981/01/15	4.80
1981/01/16	4.00
1981/01/17	4.00
1981/01/18	4.40
1981/01/19	4.00
1981/01/20	4.40
1981/01/21	4.40
1981/01/22	4.00
1981/01/23	4.00
1981/01/24	4.40
1981/01/25	4.40
1981/01/26	4.40
1981/01/27	4.00
1981/01/28	3.40
1981/01/29	3.40
1981/01/30	3.60
1981/01/31	3.60
1981/02/01	3.60
1981/02/02	3.60
1981/02/03	3.60
1981/02/04	3.80
1981/02/05	3.60
1981/02/06	3.80
1981/02/07	3.60
1981/02/08	3.40
1981/02/09	3.40
1981/02/10	3.20
1981/02/11	3.20
1981/02/12	3.20
1981/02/13	3.20
1981/02/14	3.20
1981/02/15	3.20
1981/02/16	3.20
1981/02/17	3.20
1981/02/18	3.20
1981/02/19	3.40
1981/02/20	3.40
1981/02/21	3.40
1981/02/22	3.40
1981/02/23	3.20
1981/02/24	3.20
1981/02/25	3.20
1981/02/26	3.20
1981/02/27	3.20
1981/02/28	3.20
1981/03/01	3.20
1981/03/02	3.20
1981/03/03	3.20
1981/03/04	3.40
1981/03/05	3.40
1981/03/06	3.40
1981/03/07	3.40
1981/03/08	3.40
1981/03/09	3.20
1981/03/10	3.20
1981/03/11	3.00
1981/03/12	3.00
1981/03/13	2.80
1981/03/14	2.80
1981/03/15	2.80
1981/03/16	2.80
1981/03/17	2.80
1981/03/18	2.80
1981/03/19	2.80
1981/03/20	2.60
1981/03/21	2.40
1981/03/22	2.60
1981/03/23	2.60
1981/03/24	2.60
1981/03/25	3.00
1981/03/26	3.00
1981/03/27	2.80
1981/03/28	2.80
1981/03/29	2.80
1981/03/30	2.80
1981/03/31	2.60
1981/04/01	2.00
1981/04/02	1.75
1981/04/03	1.75
1981/04/04	1.75
1981/04/05	1.75
1981/04/06	1.75
1981/04/07	1.75
1981/04/08	1.75
1981/04/09	1.75
1981/04/10	1.50
1981/04/11	1.20
1981/04/12	1.20
1981/04/13	1.20
1981/04/14	1.35
1981/04/15	1.35
1981/04/16	1.50
1981/04/17	2.25
1981/04/18	2.25
1981/04/19	2.25
1981/04/20	1.75
1981/04/21	1.75
1981/04/22	1.50
1981/04/23	1.35
1981/04/24	1.35
1981/04/25	1.50
1981/04/26	4.00
1981/04/27	5.20
1981/04/28	3.25
1981/04/29	3.00
1981/04/30	2.25
1981/05/01	2.25
1981/05/02	2.25
1981/05/03	2.25
1981/05/04	2.25
1981/05/05	4.00
1981/05/06	5.20
1981/05/07	2.75
1981/05/08	2.25
1981/05/09	2.50
1981/05/10	2.25
1981/05/11	2.00
1981/05/12	2.00
1981/05/13	1.75
1981/05/14	2.00
1981/05/15	4.00
1981/05/16	3.00
1981/05/17	3.00
1981/05/18	3.25
1981/05/19	3.75
1981/05/20	9.20
1981/05/21	7.20
1981/05/22	21.00
1981/05/23	18.00
1981/05/24	19.80
1981/05/25	21.60
1981/05/26	26.80
1981/05/27	29.60
1981/05/28	28.20
1981/05/29	35.20
1981/05/30	22.80
1981/05/31	19.20
1981/06/01	14.40
1981/06/02	22.80
1981/06/03	15.60
1981/06/04	12.60
1981/06/05	11.20
1981/06/06	9.60
1981/06/07	10.00
1981/06/08	9.20
1981/06/09	9.60
1981/06/10	10.00
1981/06/11	10.00
1981/06/12	12.00
1981/06/13	11.20
1981/06/14	10.40
1981/06/15	9.60
1981/06/16	9.20
1981/06/17	9.20
1981/06/18	8.80
1981/06/19	8.00
1981/06/20	8.00
1981/06/21	7.60
1981/06/22	8.00
1981/06/23	8.80
1981/06/24	8.40
1981/06/25	8.00
1981/06/26	20.40
1981/06/27	12.00
1981/06/28	10.80
1981/06/29	10.40
1981/06/30	9.20
1981/07/01	8.40
1981/07/02	8.80
1981/07/03	8.40
1981/07/04	8.00
1981/07/05	8.40
1981/07/06	17.40
1981/07/07	21.60
1981/07/08	28.20
1981/07/09	20.40
1981/07/10	20.40
1981/07/11	17.40
1981/07/12	15.60
1981/07/13	15.60
1981/07/14	13.20
1981/07/15	10.80
1981/07/16	10.40
1981/07/17	26.10
1981/07/18	19.20
1981/07/19	21.60
1981/07/20	35.90
1981/07/21	50.50
1981/07/22	50.50
1981/07/23	29.60
1981/07/24	27.50
1981/07/25	33.10
1981/07/26	28.90
1981/07/27	25.40
1981/07/28	24.00
1981/07/29	21.60
1981/07/30	19.20
1981/07/31	20.40
1981/08/01	30.30
1981/08/02	55.00
1981/08/03	43.60
1981/08/04	38.00
1981/08/05	43.60
1981/08/06	69.00
1981/08/07	88.80
1981/08/08	55.00
1981/08/09	42.80
1981/08/10	36.60
1981/08/11	62.20
1981/08/12	60.40
1981/08/13	47.80
1981/08/14	41.20
1981/08/15	35.20
1981/08/16	35.90
1981/08/17	30.30
1981/08/18	27.50
1981/08/19	40.40
1981/08/20	59.50
1981/08/21	46.00
1981/08/22	47.80
1981/08/23	37.30
1981/08/24	33.10
1981/08/25	29.60
1981/08/26	26.80
1981/08/27	24.70
1981/08/28	25.40
1981/08/29	23.40
1981/08/30	23.40
1981/08/31	21.60
1981/09/01	22.80
1981/09/02	26.10
1981/09/03	24.70
1981/09/04	27.50
1981/09/05	32.40
1981/09/06	45.20
1981/09/07	69.00
1981/09/08	60.40
1981/09/09	48.70
1981/09/10	41.20
1981/09/11	34.50
1981/09/12	36.60
1981/09/13	30.30
1981/09/14	26.80
1981/09/15	25.40
1981/09/16	23.40
1981/09/17	24.00
1981/09/18	21.60
1981/09/19	19.80
1981/09/20	19.20
1981/09/21	19.20
1981/09/22	19.20
1981/09/23	18.60
1981/09/24	19.80
1981/09/25	22.80
1981/09/26	23.40
1981/09/27	18.60
1981/09/28	29.60
1981/09/29	24.70
1981/09/30	19.80
1981/10/01	18.00
1981/10/02	18.00
1981/10/03	16.80
1981/10/04	18.00
1981/10/05	16.20
1981/10/06	15.60
1981/10/07	16.20
1981/10/08	24.00
1981/10/09	47.80
1981/10/10	46.90
1981/10/11	34.50
1981/10/12	28.20
1981/10/13	24.70
1981/10/14	22.20
1981/10/15	20.40
1981/10/16	19.20
1981/10/17	23.40
1981/10/18	23.40
1981/10/19	22.80
1981/10/20	21.00
1981/10/21	20.40
1981/10/22	20.40
1981/10/23	18.60
1981/10/24	18.00
1981/10/25	19.80
1981/10/26	32.40
1981/10/27	24.00
1981/10/28	21.60
1981/10/29	18.60
1981/10/30	16.80
1981/10/31	16.20
1981/11/01	16.20
1981/11/02	16.80
1981/11/03	16.20
1981/11/04	15.60
1981/11/05	14.40
1981/11/06	15.00
1981/11/07	15.60
1981/11/08	19.20
1981/11/09	35.90
1981/11/10	26.80
1981/11/11	22.80
1981/11/12	20.40
1981/11/13	19.20
1981/11/14	18.60
1981/11/15	20.40
1981/11/16	26.80
1981/11/17	40.40
1981/11/18	33.80
1981/11/19	37.30
1981/11/20	32.40
1981/11/21	27.50
1981/11/22	24.70
1981/11/23	22.20
1981/11/24	20.40
1981/11/25	19.20
1981/11/26	18.60
1981/11/27	18.00
1981/11/28	17.40
1981/11/29	16.80
1981/11/30	16.20
1981/12/01	15.60
1981/12/02	15.60
1981/12/03	15.60
1981/12/04	15.00
1981/12/05	14.40
1981/12/06	13.80
1981/12/07	13.80
1981/12/08	13.20
1981/12/09	12.60
1981/12/10	12.60
1981/12/11	12.60
1981/12/12	12.60
1981/12/13	12.00
1981/12/14	12.00
1981/12/15	13.80
1981/12/16	13.20
1981/12/17	12.00
1981/12/18	11.60
1981/12/19	10.80
1981/12/20	10.40
1981/12/21	10.00
1981/12/22	10.00
1981/12/23	10.00
1981/12/24	9.60
1981/12/25	9.60
1981/12/26	10.00
1981/12/27	9.60
1981/12/28	9.60
1981/12/29	9.20
1981/12/30	9.60
1981/12/31	9.60
#===========================================
# Number of observations = 365 / 365
# Average = 15.29