1987/01/01	4.00
1987/01/02	3.91
1987/01/03	3.81
1987/01/04	3.81
1987/01/05	3.72
1987/01/06	3.72
1987/01/07	3.63
1987/01/08	3.53
1987/01/09	3.53
1987/01/10	3.44
1987/01/11	3.34
1987/01/12	3.34
1987/01/13	3.25
1987/01/14	3.16
1987/01/15	3.06
1987/01/16	2.97
1987/01/17	2.88
1987/01/18	2.78
1987/01/19	2.69
1987/01/20	2.69
1987/01/21	2.59
1987/01/22	2.59
1987/01/23	2.50
1987/01/24	2.41
1987/01/25	2.41
1987/01/26	2.31
1987/01/27	2.22
1987/01/28	2.13
1987/01/29	2.03
1987/01/30	1.94
1987/01/31	1.94
1987/02/01	1.94
1987/02/02	1.84
1987/02/03	1.84
1987/02/04	1.84
1987/02/05	1.75
1987/02/06	1.75
1987/02/07	1.66
1987/02/08	1.56
1987/02/09	1.66
1987/02/10	1.66
1987/02/11	1.66
1987/02/12	1.56
1987/02/13	1.56
1987/02/14	1.56
1987/02/15	1.47
1987/02/16	1.47
1987/02/17	1.47
1987/02/18	1.47
1987/02/19	1.47
1987/02/20	1.47
1987/02/21	1.38
1987/02/22	1.47
1987/02/23	1.56
1987/02/24	1.56
1987/02/25	1.75
1987/02/26	2.22
1987/02/27	2.41
1987/02/28	2.31
1987/03/01	1.94
1987/03/02	1.94
1987/03/03	3.06
1987/03/04	2.78
1987/03/05	2.41
1987/03/06	2.50
1987/03/07	2.50
1987/03/08	3.81
1987/03/09	5.13
1987/03/10	4.66
1987/03/11	4.28
1987/03/12	3.53
1987/03/13	3.16
1987/03/14	3.06
1987/03/15	2.97
1987/03/16	2.78
1987/03/17	2.97
1987/03/18	2.13
1987/03/19	1.94
1987/03/20	1.66
1987/03/21	1.38
1987/03/22	1.19
1987/03/23	1.00
1987/03/24	0.95
1987/03/25	0.95
1987/03/26	0.95
1987/03/27	0.90
1987/03/28	0.75
1987/03/29	0.70
1987/03/30	0.70
1987/03/31	0.75
1987/04/01	1.05
1987/04/02	1.10
1987/04/03	1.45
1987/04/04	1.35
1987/04/05	1.25
1987/04/06	1.25
1987/04/07	1.25
1987/04/08	1.15
1987/04/09	1.05
1987/04/10	0.90
1987/04/11	0.90
1987/04/12	0.85
1987/04/13	0.75
1987/04/14	0.70
1987/04/15	0.65
1987/04/16	0.55
1987/04/17	0.70
1987/04/18	0.95
1987/04/19	1.15
1987/04/20	0.75
1987/04/21	0.70
1987/04/22	1.10
1987/04/23	3.10
1987/04/24	2.68
1987/04/25	2.92
1987/04/26	2.68
1987/04/27	2.13
1987/04/28	1.78
1987/04/29	1.85
1987/04/30	1.78
1987/05/01	1.64
1987/05/02	2.36
1987/05/03	1.64
1987/05/04	1.45
1987/05/05	1.57
1987/05/06	2.92
1987/05/07	5.36
1987/05/08	2.84
1987/05/09	2.36
1987/05/10	1.71
1987/05/11	1.64
1987/05/12	2.84
1987/05/13	4.30
1987/05/14	5.24
1987/05/15	7.50
1987/05/16	4.10
1987/05/17	3.20
1987/05/18	2.44
1987/05/19	2.28
1987/05/20	2.44
1987/05/21	2.52
1987/05/22	3.40
1987/05/23	6.33
1987/05/24	5.00
1987/05/25	6.59
1987/05/26	9.30
1987/05/27	6.08
1987/05/28	4.00
1987/05/29	3.20
1987/05/30	6.59
1987/05/31	5.96
1987/06/01	5.48
1987/06/02	4.90
1987/06/03	7.95
1987/06/04	9.75
1987/06/05	20.40
1987/06/06	11.35
1987/06/07	8.40
1987/06/08	6.98
1987/06/09	10.20
1987/06/10	20.40
1987/06/11	18.40
1987/06/12	12.56
1987/06/13	9.15
1987/06/14	7.50
1987/06/15	7.50
1987/06/16	5.96
1987/06/17	5.60
1987/06/18	6.72
1987/06/19	9.15
1987/06/20	6.98
1987/06/21	8.25
1987/06/22	13.46
1987/06/23	13.46
1987/06/24	10.35
1987/06/25	7.95
1987/06/26	6.46
1987/06/27	5.12
1987/06/28	4.30
1987/06/29	3.80
1987/06/30	3.50
1987/07/01	3.40
1987/07/02	3.80
1987/07/03	5.36
1987/07/04	5.96
1987/07/05	4.90
1987/07/06	4.70
1987/07/07	4.60
1987/07/08	4.90
1987/07/09	5.12
1987/07/10	5.48
1987/07/11	5.12
1987/07/12	5.36
1987/07/13	5.12
1987/07/14	4.80
1987/07/15	4.10
1987/07/16	3.70
1987/07/17	3.40
1987/07/18	3.00
1987/07/19	2.76
1987/07/20	2.60
1987/07/21	2.44
1987/07/22	2.36
1987/07/23	2.28
1987/07/24	2.36
1987/07/25	2.28
1987/07/26	2.28
1987/07/27	2.13
1987/07/28	3.10
1987/07/29	4.30
1987/07/30	3.80
1987/07/31	3.70
1987/08/01	4.40
1987/08/02	5.24
1987/08/03	5.36
1987/08/04	4.40
1987/08/05	4.10
1987/08/06	6.08
1987/08/07	6.46
1987/08/08	5.96
1987/08/09	7.24
1987/08/10	8.40
1987/08/11	10.84
1987/08/12	16.40
1987/08/13	26.25
1987/08/14	14.60
1987/08/15	14.20
1987/08/16	15.20
1987/08/17	41.70
1987/08/18	153.10
1987/08/19	91.15
1987/08/20	57.30
1987/08/21	36.90
1987/08/22	34.25
1987/08/23	34.75
1987/08/24	168.40
1987/08/25	162.55
1987/08/26	98.50
1987/08/27	62.80
1987/08/28	46.20
1987/08/29	35.50
1987/08/30	26.75
1987/08/31	25.60
1987/09/01	24.80
1987/09/02	31.00
1987/09/03	29.50
1987/09/04	27.00
1987/09/05	23.40
1987/09/06	29.25
1987/09/07	37.80
1987/09/08	230.00
1987/09/09	290.80
1987/09/10	241.35
1987/09/11	186.00
1987/09/12	148.60
1987/09/13	143.20
1987/09/14	193.00
1987/09/15	139.15
1987/09/16	101.65
1987/09/17	88.70
1987/09/18	71.90
1987/09/19	83.45
1987/09/20	109.60
1987/09/21	83.80
1987/09/22	76.80
1987/09/23	76.80
1987/09/24	79.60
1987/09/25	65.25
1987/09/26	86.60
1987/09/27	104.40
1987/09/28	95.00
1987/09/29	79.60
1987/09/30	68.05
1987/10/01	57.30
1987/10/02	58.50
1987/10/03	71.55
1987/10/04	85.20
1987/10/05	96.40
1987/10/06	83.80
1987/10/07	75.40
1987/10/08	55.20
1987/10/09	68.40
1987/10/10	85.55
1987/10/11	73.30
1987/10/12	62.80
1987/10/13	55.20
1987/10/14	56.70
1987/10/15	51.90
1987/10/16	47.70
1987/10/17	40.80
1987/10/18	35.00
1987/10/19	45.60
1987/10/20	47.40
1987/10/21	50.10
1987/10/22	52.50
1987/10/23	45.00
1987/10/24	38.40
1987/10/25	33.00
1987/10/26	31.50
1987/10/27	27.25
1987/10/28	25.20
1987/10/29	23.60
1987/10/30	22.40
1987/10/31	21.20
1987/11/01	21.40
1987/11/02	28.25
1987/11/03	25.80
1987/11/04	22.20
1987/11/05	20.40
1987/11/06	19.40
1987/11/07	18.60
1987/11/08	17.40
1987/11/09	15.80
1987/11/10	14.80
1987/11/11	14.00
1987/11/12	14.00
1987/11/13	14.00
1987/11/14	14.80
1987/11/15	13.46
1987/11/16	13.28
1987/11/17	12.92
1987/11/18	12.92
1987/11/19	13.10
1987/11/20	16.00
1987/11/21	16.40
1987/11/22	12.74
1987/11/23	11.35
1987/11/24	10.50
1987/11/25	10.20
1987/11/26	9.75
1987/11/27	10.05
1987/11/28	9.90
1987/11/29	11.86
1987/11/30	9.75
1987/12/01	8.70
1987/12/02	8.10
1987/12/03	7.50
1987/12/04	7.24
1987/12/05	6.98
1987/12/06	6.72
1987/12/07	6.59
1987/12/08	6.46
1987/12/09	6.08
1987/12/10	5.84
1987/12/11	5.84
1987/12/12	5.72
1987/12/13	5.72
1987/12/14	5.60
1987/12/15	5.36
1987/12/16	5.12
1987/12/17	5.00
1987/12/18	4.90
1987/12/19	4.70
1987/12/20	4.60
1987/12/21	4.40
1987/12/22	4.20
1987/12/23	4.30
1987/12/24	4.20
1987/12/25	4.10
1987/12/26	3.90
1987/12/27	3.80
1987/12/28	3.70
1987/12/29	3.50
1987/12/30	3.50
1987/12/31	3.50
#===========================================
# Number of observations = 365 / 365
# Average = 19.95