1987/01/01	13.40
1987/01/02	13.70
1987/01/03	11.60
1987/01/04	11.00
1987/01/05	10.70
1987/01/06	10.70
1987/01/07	10.70
1987/01/08	10.40
1987/01/09	10.40
1987/01/10	10.40
1987/01/11	10.40
1987/01/12	10.40
1987/01/13	10.10
1987/01/14	10.10
1987/01/15	10.10
1987/01/16	10.10
1987/01/17	10.10
1987/01/18	9.80
1987/01/19	9.80
1987/01/20	9.80
1987/01/21	9.80
1987/01/22	9.80
1987/01/23	9.50
1987/01/24	9.50
1987/01/25	9.50
1987/01/26	9.50
1987/01/27	9.50
1987/01/28	9.50
1987/01/29	9.50
1987/01/30	9.50
1987/01/31	9.50
1987/02/01	9.50
1987/02/02	9.50
1987/02/03	9.20
1987/02/04	9.20
1987/02/05	9.20
1987/02/06	9.20
1987/02/07	9.20
1987/02/08	9.80
1987/02/09	11.00
1987/02/10	11.60
1987/02/11	11.30
1987/02/12	10.10
1987/02/13	9.50
1987/02/14	9.20
1987/02/15	8.90
1987/02/16	8.90
1987/02/17	8.90
1987/02/18	8.60
1987/02/19	8.60
1987/02/20	8.60
1987/02/21	9.20
1987/02/22	8.90
1987/02/23	8.60
1987/02/24	8.30
1987/02/25	8.00
1987/02/26	8.00
1987/02/27	8.00
1987/02/28	8.00
1987/03/01	8.00
1987/03/02	9.20
1987/03/03	12.50
1987/03/04	11.90
1987/03/05	11.30
1987/03/06	10.40
1987/03/07	10.10
1987/03/08	9.50
1987/03/09	8.60
1987/03/10	8.00
1987/03/11	8.00
1987/03/12	8.00
1987/03/13	8.00
1987/03/14	7.75
1987/03/15	7.75
1987/03/16	7.75
1987/03/17	7.50
1987/03/18	7.50
1987/03/19	7.50
1987/03/20	7.50
1987/03/21	7.50
1987/03/22	7.50
1987/03/23	7.50
1987/03/24	7.50
1987/03/25	7.50
1987/03/26	7.50
1987/03/27	7.50
1987/03/28	7.50
1987/03/29	7.50
1987/03/30	7.75
1987/03/31	7.75
1987/04/01	7.75
1987/04/02	7.50
1987/04/03	7.50
1987/04/04	7.25
1987/04/05	7.25
1987/04/06	7.00
1987/04/07	6.75
1987/04/08	7.00
1987/04/09	7.00
1987/04/10	7.00
1987/04/11	7.00
1987/04/12	6.75
1987/04/13	6.75
1987/04/14	6.75
1987/04/15	7.00
1987/04/16	7.00
1987/04/17	7.00
1987/04/18	6.75
1987/04/19	7.00
1987/04/20	7.75
1987/04/21	9.50
1987/04/22	11.90
1987/04/23	11.00
1987/04/24	10.10
1987/04/25	8.00
1987/04/26	8.00
1987/04/27	8.00
1987/04/28	8.90
1987/04/29	11.60
1987/04/30	11.00
1987/05/01	9.80
1987/05/02	8.90
1987/05/03	8.60
1987/05/04	11.30
1987/05/05	14.00
1987/05/06	16.45
1987/05/07	13.10
1987/05/08	10.70
1987/05/09	9.20
1987/05/10	8.90
1987/05/11	8.30
1987/05/12	8.30
1987/05/13	8.00
1987/05/14	8.00
1987/05/15	8.00
1987/05/16	7.75
1987/05/17	7.50
1987/05/18	7.50
1987/05/19	7.25
1987/05/20	7.25
1987/05/21	7.25
1987/05/22	6.75
1987/05/23	6.75
1987/05/24	6.50
1987/05/25	6.50
1987/05/26	6.50
1987/05/27	6.50
1987/05/28	6.25
1987/05/29	6.00
1987/05/30	8.90
1987/05/31	8.90
1987/06/01	8.90
1987/06/02	9.80
1987/06/03	14.35
1987/06/04	15.40
1987/06/05	12.20
1987/06/06	9.80
1987/06/07	9.50
1987/06/08	8.90
1987/06/09	11.90
1987/06/10	16.10
1987/06/11	13.10
1987/06/12	11.30
1987/06/13	11.30
1987/06/14	11.90
1987/06/15	11.30
1987/06/16	11.30
1987/06/17	12.50
1987/06/18	15.40
1987/06/19	13.10
1987/06/20	12.80
1987/06/21	12.20
1987/06/22	11.30
1987/06/23	10.40
1987/06/24	9.80
1987/06/25	9.50
1987/06/26	9.20
1987/06/27	8.60
1987/06/28	8.30
1987/06/29	12.80
1987/06/30	14.00
1987/07/01	14.70
1987/07/02	13.10
1987/07/03	10.70
1987/07/04	11.00
1987/07/05	11.30
1987/07/06	12.80
1987/07/07	13.40
1987/07/08	13.10
1987/07/09	13.40
1987/07/10	12.50
1987/07/11	12.50
1987/07/12	12.20
1987/07/13	10.70
1987/07/14	10.10
1987/07/15	10.70
1987/07/16	10.70
1987/07/17	11.00
1987/07/18	11.90
1987/07/19	11.00
1987/07/20	10.10
1987/07/21	9.50
1987/07/22	9.20
1987/07/23	8.60
1987/07/24	13.10
1987/07/25	19.50
1987/07/26	18.30
1987/07/27	15.05
1987/07/28	14.00
1987/07/29	12.50
1987/07/30	11.90
1987/07/31	11.60
1987/08/01	16.45
1987/08/02	21.95
1987/08/03	19.10
1987/08/04	17.15
1987/08/05	16.10
1987/08/06	14.00
1987/08/07	13.70
1987/08/08	13.40
1987/08/09	13.70
1987/08/10	13.40
1987/08/11	13.70
1987/08/12	13.70
1987/08/13	13.40
1987/08/14	13.10
1987/08/15	12.80
1987/08/16	15.40
1987/08/17	17.50
1987/08/18	41.10
1987/08/19	52.35
1987/08/20	29.60
1987/08/21	24.20
1987/08/22	21.50
1987/08/23	55.60
1987/08/24	167.60
1987/08/25	77.70
1987/08/26	45.90
1987/08/27	34.50
1987/08/28	27.35
1987/08/29	23.75
1987/08/30	21.10
1987/08/31	19.10
1987/09/01	19.10
1987/09/02	18.70
1987/09/03	41.10
1987/09/04	24.65
1987/09/05	23.75
1987/09/06	23.30
1987/09/07	21.95
1987/09/08	22.40
1987/09/09	28.25
1987/09/10	23.30
1987/09/11	22.85
1987/09/12	21.10
1987/09/13	19.90
1987/09/14	21.50
1987/09/15	26.45
1987/09/16	29.15
1987/09/17	25.10
1987/09/18	22.85
1987/09/19	25.10
1987/09/20	34.50
1987/09/21	32.50
1987/09/22	29.15
1987/09/23	25.10
1987/09/24	23.75
1987/09/25	21.50
1987/09/26	29.15
1987/09/27	32.50
1987/09/28	30.50
1987/09/29	28.70
1987/09/30	26.90
1987/10/01	23.30
1987/10/02	25.10
1987/10/03	23.75
1987/10/04	22.40
1987/10/05	24.20
1987/10/06	25.55
1987/10/07	23.75
1987/10/08	22.40
1987/10/09	26.00
1987/10/10	36.00
1987/10/11	26.90
1987/10/12	24.20
1987/10/13	20.30
1987/10/14	19.10
1987/10/15	20.30
1987/10/16	18.70
1987/10/17	18.30
1987/10/18	17.50
1987/10/19	16.10
1987/10/20	17.15
1987/10/21	22.85
1987/10/22	19.50
1987/10/23	17.50
1987/10/24	17.90
1987/10/25	17.90
1987/10/26	16.10
1987/10/27	15.40
1987/10/28	14.70
1987/10/29	14.35
1987/10/30	14.00
1987/10/31	14.00
1987/11/01	13.70
1987/11/02	14.00
1987/11/03	17.90
1987/11/04	23.75
1987/11/05	19.10
1987/11/06	17.90
1987/11/07	18.70
1987/11/08	105.40
1987/11/09	49.75
1987/11/10	31.50
1987/11/11	27.80
1987/11/12	25.55
1987/11/13	25.55
1987/11/14	26.90
1987/11/15	23.30
1987/11/16	20.70
1987/11/17	19.90
1987/11/18	19.50
1987/11/19	17.15
1987/11/20	16.80
1987/11/21	16.10
1987/11/22	15.75
1987/11/23	15.40
1987/11/24	15.05
1987/11/25	14.70
1987/11/26	14.35
1987/11/27	14.00
1987/11/28	14.00
1987/11/29	13.70
1987/11/30	14.00
1987/12/01	13.70
1987/12/02	13.70
1987/12/03	13.40
1987/12/04	13.40
1987/12/05	13.40
1987/12/06	13.40
1987/12/07	13.40
1987/12/08	13.10
1987/12/09	13.10
1987/12/10	13.10
1987/12/11	13.10
1987/12/12	13.10
1987/12/13	12.80
1987/12/14	12.80
1987/12/15	12.80
1987/12/16	12.50
1987/12/17	12.20
1987/12/18	12.20
1987/12/19	12.20
1987/12/20	12.20
1987/12/21	12.20
1987/12/22	12.20
1987/12/23	11.30
1987/12/24	11.00
1987/12/25	10.70
1987/12/26	10.70
1987/12/27	10.40
1987/12/28	10.40
1987/12/29	10.10
1987/12/30	10.10
1987/12/31	10.10
#===========================================
# Number of observations = 365 / 365
# Average = 14.90