1981/01/01	4.58
1981/01/02	4.58
1981/01/03	4.58
1981/01/04	4.37
1981/01/05	4.37
1981/01/06	4.16
1981/01/07	4.16
1981/01/08	4.16
1981/01/09	4.16
1981/01/10	3.95
1981/01/11	3.95
1981/01/12	3.95
1981/01/13	3.95
1981/01/14	3.74
1981/01/15	3.74
1981/01/16	3.74
1981/01/17	3.74
1981/01/18	3.53
1981/01/19	3.53
1981/01/20	3.53
1981/01/21	3.53
1981/01/22	3.53
1981/01/23	3.53
1981/01/24	3.53
1981/01/25	3.53
1981/01/26	3.53
1981/01/27	3.32
1981/01/28	3.32
1981/01/29	3.32
1981/01/30	3.11
1981/01/31	3.11
1981/02/01	3.11
1981/02/02	2.90
1981/02/03	2.90
1981/02/04	2.90
1981/02/05	2.90
1981/02/06	2.90
1981/02/07	2.90
1981/02/08	2.73
1981/02/09	2.73
1981/02/10	2.73
1981/02/11	2.73
1981/02/12	2.73
1981/02/13	2.73
1981/02/14	2.56
1981/02/15	2.56
1981/02/16	2.56
1981/02/17	2.56
1981/02/18	2.39
1981/02/19	2.39
1981/02/20	2.39
1981/02/21	2.39
1981/02/22	2.39
1981/02/23	2.39
1981/02/24	2.39
1981/02/25	2.22
1981/02/26	2.22
1981/02/27	2.05
1981/02/28	2.05
1981/03/01	2.05
1981/03/02	2.05
1981/03/03	2.05
1981/03/04	2.05
1981/03/05	1.88
1981/03/06	1.88
1981/03/07	2.05
1981/03/08	2.05
1981/03/09	2.05
1981/03/10	2.05
1981/03/11	2.05
1981/03/12	2.05
1981/03/13	2.05
1981/03/14	1.88
1981/03/15	1.71
1981/03/16	1.71
1981/03/17	1.54
1981/03/18	1.54
1981/03/19	1.54
1981/03/20	1.54
1981/03/21	1.54
1981/03/22	1.54
1981/03/23	1.54
1981/03/24	1.37
1981/03/25	1.54
1981/03/26	1.20
1981/03/27	1.14
1981/03/28	1.14
1981/03/29	1.14
1981/03/30	1.14
1981/03/31	1.14
1981/04/01	1.80
1981/04/02	1.80
1981/04/03	2.00
1981/04/04	1.80
1981/04/05	1.60
1981/04/06	1.60
1981/04/07	1.60
1981/04/08	1.60
1981/04/09	1.60
1981/04/10	1.40
1981/04/11	1.60
1981/04/12	1.60
1981/04/13	1.40
1981/04/14	4.20
1981/04/15	5.20
1981/04/16	2.88
1981/04/17	3.98
1981/04/18	3.76
1981/04/19	2.66
1981/04/20	2.22
1981/04/21	2.00
1981/04/22	2.44
1981/04/23	2.66
1981/04/24	2.00
1981/04/25	2.00
1981/04/26	2.66
1981/04/27	3.32
1981/04/28	2.66
1981/04/29	2.00
1981/04/30	2.44
1981/05/01	2.22
1981/05/02	2.22
1981/05/03	2.22
1981/05/04	5.45
1981/05/05	6.45
1981/05/06	4.45
1981/05/07	2.88
1981/05/08	2.44
1981/05/09	2.44
1981/05/10	8.70
1981/05/11	3.32
1981/05/12	7.45
1981/05/13	6.95
1981/05/14	23.38
1981/05/15	5.70
1981/05/16	6.20
1981/05/17	8.20
1981/05/18	6.95
1981/05/19	7.20
1981/05/20	5.95
1981/05/21	41.70
1981/05/22	32.95
1981/05/23	15.06
1981/05/24	15.36
1981/05/25	13.87
1981/05/26	11.28
1981/05/27	8.95
1981/05/28	8.45
1981/05/29	11.80
1981/05/30	10.24
1981/05/31	8.20
1981/06/01	6.70
1981/06/02	11.28
1981/06/03	8.20
1981/06/04	6.20
1981/06/05	5.70
1981/06/06	5.20
1981/06/07	5.70
1981/06/08	9.98
1981/06/09	7.70
1981/06/10	6.20
1981/06/11	7.70
1981/06/12	5.95
1981/06/13	5.95
1981/06/14	5.95
1981/06/15	5.45
1981/06/16	8.20
1981/06/17	6.95
1981/06/18	6.70
1981/06/19	11.54
1981/06/20	14.16
1981/06/21	14.16
1981/06/22	10.24
1981/06/23	42.55
1981/06/24	64.17
1981/06/25	47.85
1981/06/26	26.20
1981/06/27	19.40
1981/06/28	15.97
1981/06/29	12.69
1981/06/30	12.69
1981/07/01	9.98
1981/07/02	8.70
1981/07/03	7.95
1981/07/04	8.70
1981/07/05	16.58
1981/07/06	71.07
1981/07/07	110.50
1981/07/08	63.23
1981/07/09	42.98
1981/07/10	135.37
1981/07/11	90.39
1981/07/12	59.43
1981/07/13	45.60
1981/07/14	33.75
1981/07/15	32.95
1981/07/16	34.15
1981/07/17	29.13
1981/07/18	40.85
1981/07/19	34.95
1981/07/20	46.95
1981/07/21	37.45
1981/07/22	37.45
1981/07/23	31.75
1981/07/24	29.13
1981/07/25	64.17
1981/07/26	53.25
1981/07/27	50.10
1981/07/28	77.28
1981/07/29	59.43
1981/07/30	73.12
1981/07/31	90.93
1981/08/01	65.60
1981/08/02	55.63
1981/08/03	65.12
1981/08/04	60.85
1981/08/05	85.10
1981/08/06	62.28
1981/08/07	56.58
1981/08/08	50.10
1981/08/09	43.83
1981/08/10	38.73
1981/08/11	57.05
1981/08/12	51.45
1981/08/13	44.70
1981/08/14	39.58
1981/08/15	37.03
1981/08/16	33.35
1981/08/17	31.38
1981/08/18	29.50
1981/08/19	34.95
1981/08/20	30.63
1981/08/21	27.28
1981/08/22	26.20
1981/08/23	25.48
1981/08/24	28.00
1981/08/25	24.40
1981/08/26	22.70
1981/08/27	22.36
1981/08/28	34.95
1981/08/29	25.48
1981/08/30	22.02
1981/08/31	22.36
1981/09/01	21.34
1981/09/02	79.36
1981/09/03	43.83
1981/09/04	111.08
1981/09/05	75.72
1981/09/06	61.33
1981/09/07	77.80
1981/09/08	60.85
1981/09/09	69.03
1981/09/10	85.10
1981/09/11	51.00
1981/09/12	44.25
1981/09/13	39.15
1981/09/14	35.35
1981/09/15	33.35
1981/09/16	32.95
1981/09/17	30.63
1981/09/18	27.28
1981/09/19	25.48
1981/09/20	24.06
1981/09/21	22.70
1981/09/22	22.02
1981/09/23	22.36
1981/09/24	21.68
1981/09/25	20.04
1981/09/26	19.08
1981/09/27	18.44
1981/09/28	17.50
1981/09/29	16.89
1981/09/30	16.58
1981/10/01	16.28
1981/10/02	18.76
1981/10/03	17.50
1981/10/04	17.50
1981/10/05	15.97
1981/10/06	15.97
1981/10/07	15.67
1981/10/08	15.36
1981/10/09	15.67
1981/10/10	21.00
1981/10/11	23.72
1981/10/12	22.02
1981/10/13	21.34
1981/10/14	16.89
1981/10/15	15.36
1981/10/16	15.06
1981/10/17	14.75
1981/10/18	15.36
1981/10/19	16.89
1981/10/20	14.75
1981/10/21	14.16
1981/10/22	13.87
1981/10/23	12.98
1981/10/24	13.28
1981/10/25	12.98
1981/10/26	12.98
1981/10/27	12.10
1981/10/28	11.54
1981/10/29	11.54
1981/10/30	11.54
1981/10/31	11.28
1981/11/01	11.02
1981/11/02	10.76
1981/11/03	10.50
1981/11/04	10.50
1981/11/05	10.50
1981/11/06	10.24
1981/11/07	10.24
1981/11/08	10.24
1981/11/09	10.24
1981/11/10	10.50
1981/11/11	9.98
1981/11/12	9.72
1981/11/13	9.46
1981/11/14	10.76
1981/11/15	11.28
1981/11/16	10.24
1981/11/17	14.16
1981/11/18	20.36
1981/11/19	13.87
1981/11/20	12.39
1981/11/21	13.87
1981/11/22	13.28
1981/11/23	10.50
1981/11/24	9.98
1981/11/25	9.72
1981/11/26	9.46
1981/11/27	9.20
1981/11/28	8.70
1981/11/29	8.70
1981/11/30	8.20
1981/12/01	8.20
1981/12/02	7.95
1981/12/03	7.95
1981/12/04	7.95
1981/12/05	7.95
1981/12/06	7.95
1981/12/07	7.95
1981/12/08	7.95
1981/12/09	7.70
1981/12/10	7.70
1981/12/11	7.45
1981/12/12	7.45
1981/12/13	7.45
1981/12/14	7.45
1981/12/15	9.46
1981/12/16	7.95
1981/12/17	7.45
1981/12/18	7.45
1981/12/19	7.20
1981/12/20	7.20
1981/12/21	6.95
1981/12/22	6.95
1981/12/23	6.95
1981/12/24	6.70
1981/12/25	6.70
1981/12/26	6.70
1981/12/27	6.70
1981/12/28	6.70
1981/12/29	6.45
1981/12/30	6.45
1981/12/31	6.45
#===========================================
# Number of observations = 365 / 365
# Average = 16.66