1981/01/01	3.02
1981/01/02	2.88
1981/01/03	2.88
1981/01/04	3.50
1981/01/05	3.90
1981/01/06	4.50
1981/01/07	3.50
1981/01/08	2.74
1981/01/09	2.18
1981/01/10	2.46
1981/01/11	2.32
1981/01/12	2.18
1981/01/13	2.46
1981/01/14	2.32
1981/01/15	2.60
1981/01/16	2.74
1981/01/17	2.46
1981/01/18	2.46
1981/01/19	2.88
1981/01/20	3.02
1981/01/21	2.74
1981/01/22	2.60
1981/01/23	2.60
1981/01/24	2.32
1981/01/25	2.04
1981/01/26	1.80
1981/01/27	1.60
1981/01/28	1.60
1981/01/29	1.80
1981/01/30	2.60
1981/01/31	2.32
1981/02/01	2.60
1981/02/02	2.74
1981/02/03	3.02
1981/02/04	3.90
1981/02/05	3.50
1981/02/06	3.02
1981/02/07	2.74
1981/02/08	3.02
1981/02/09	2.74
1981/02/10	3.02
1981/02/11	3.02
1981/02/12	3.16
1981/02/13	3.02
1981/02/14	2.74
1981/02/15	2.60
1981/02/16	2.60
1981/02/17	2.18
1981/02/18	2.04
1981/02/19	1.80
1981/02/20	1.80
1981/02/21	1.70
1981/02/22	1.80
1981/02/23	2.04
1981/02/24	2.32
1981/02/25	2.32
1981/02/26	2.04
1981/02/27	2.18
1981/02/28	1.90
1981/03/01	2.04
1981/03/02	2.18
1981/03/03	2.46
1981/03/04	2.04
1981/03/05	2.46
1981/03/06	2.46
1981/03/07	2.32
1981/03/08	6.62
1981/03/09	6.40
1981/03/10	4.30
1981/03/11	4.30
1981/03/12	3.50
1981/03/13	3.70
1981/03/14	3.30
1981/03/15	2.88
1981/03/16	2.32
1981/03/17	1.70
1981/03/18	1.60
1981/03/19	1.60
1981/03/20	1.60
1981/03/21	1.60
1981/03/22	1.80
1981/03/23	1.90
1981/03/24	1.90
1981/03/25	2.88
1981/03/26	3.16
1981/03/27	3.02
1981/03/28	2.32
1981/03/29	1.80
1981/03/30	1.90
1981/03/31	2.74
1981/04/01	2.64
1981/04/02	3.36
1981/04/03	2.64
1981/04/04	2.10
1981/04/05	1.88
1981/04/06	1.77
1981/04/07	1.77
1981/04/08	1.66
1981/04/09	1.88
1981/04/10	1.99
1981/04/11	1.99
1981/04/12	1.99
1981/04/13	2.64
1981/04/14	3.18
1981/04/15	2.82
1981/04/16	3.00
1981/04/17	3.72
1981/04/18	3.18
1981/04/19	2.28
1981/04/20	2.28
1981/04/21	2.28
1981/04/22	1.88
1981/04/23	2.28
1981/04/24	2.28
1981/04/25	1.99
1981/04/26	2.82
1981/04/27	4.40
1981/04/28	3.54
1981/04/29	3.36
1981/04/30	3.72
1981/05/01	3.54
1981/05/02	3.54
1981/05/03	3.00
1981/05/04	2.82
1981/05/05	11.51
1981/05/06	13.50
1981/05/07	7.90
1981/05/08	5.65
1981/05/09	4.65
1981/05/10	4.40
1981/05/11	6.15
1981/05/12	5.40
1981/05/13	5.15
1981/05/14	4.65
1981/05/15	4.40
1981/05/16	2.82
1981/05/17	2.28
1981/05/18	4.40
1981/05/19	8.40
1981/05/20	7.40
1981/05/21	4.65
1981/05/22	10.06
1981/05/23	15.92
1981/05/24	35.06
1981/05/25	50.12
1981/05/26	26.24
1981/05/27	10.35
1981/05/28	5.15
1981/05/29	7.65
1981/05/30	6.15
1981/05/31	5.65
1981/06/01	4.40
1981/06/02	6.90
1981/06/03	5.90
1981/06/04	5.15
1981/06/05	6.40
1981/06/06	7.15
1981/06/07	6.65
1981/06/08	6.15
1981/06/09	5.90
1981/06/10	3.54
1981/06/11	3.00
1981/06/12	2.64
1981/06/13	3.18
1981/06/14	3.00
1981/06/15	2.28
1981/06/16	1.99
1981/06/17	1.77
1981/06/18	2.10
1981/06/19	2.10
1981/06/20	2.10
1981/06/21	3.00
1981/06/22	2.10
1981/06/23	2.28
1981/06/24	3.36
1981/06/25	3.36
1981/06/26	3.36
1981/06/27	3.18
1981/06/28	2.82
1981/06/29	2.64
1981/06/30	2.28
1981/07/01	2.10
1981/07/02	2.10
1981/07/03	2.64
1981/07/04	3.54
1981/07/05	4.65
1981/07/06	23.23
1981/07/07	63.55
1981/07/08	36.50
1981/07/09	90.80
1981/07/10	132.63
1981/07/11	137.90
1981/07/12	131.75
1981/07/13	116.88
1981/07/14	60.95
1981/07/15	38.00
1981/07/16	21.20
1981/07/17	29.86
1981/07/18	21.60
1981/07/19	20.00
1981/07/20	26.24
1981/07/21	34.58
1981/07/22	73.40
1981/07/23	165.00
1981/07/24	165.98
1981/07/25	124.75
1981/07/26	142.40
1981/07/27	155.50
1981/07/28	122.12
1981/07/29	124.75
1981/07/30	119.50
1981/07/31	126.50
1981/08/01	111.63
1981/08/02	59.00
1981/08/03	86.80
1981/08/04	93.20
1981/08/05	120.38
1981/08/06	148.85
1981/08/07	134.38
1981/08/08	127.38
1981/08/09	119.50
1981/08/10	111.63
1981/08/11	196.65
1981/08/12	152.65
1981/08/13	110.75
1981/08/14	94.00
1981/08/15	58.40
1981/08/16	53.60
1981/08/17	49.55
1981/08/18	29.40
1981/08/19	28.48
1981/08/20	33.14
1981/08/21	35.06
1981/08/22	32.66
1981/08/23	34.10
1981/08/24	37.00
1981/08/25	31.70
1981/08/26	28.02
1981/08/27	20.00
1981/08/28	24.52
1981/08/29	26.24
1981/08/30	20.00
1981/08/31	17.72
1981/09/01	30.78
1981/09/02	114.25
1981/09/03	44.38
1981/09/04	28.94
1981/09/05	26.24
1981/09/06	26.24
1981/09/07	50.70
1981/09/08	58.40
1981/09/09	55.40
1981/09/10	109.00
1981/09/11	106.38
1981/09/12	101.20
1981/09/13	94.00
1981/09/14	60.95
1981/09/15	24.95
1981/09/16	18.80
1981/09/17	19.20
1981/09/18	18.44
1981/09/19	16.64
1981/09/20	15.56
1981/09/21	12.48
1981/09/22	10.06
1981/09/23	9.48
1981/09/24	21.60
1981/09/25	27.10
1981/09/26	27.56
1981/09/27	21.60
1981/09/28	17.36
1981/09/29	16.28
1981/09/30	15.92
1981/10/01	15.20
1981/10/02	13.84
1981/10/03	13.84
1981/10/04	12.48
1981/10/05	12.82
1981/10/06	12.14
1981/10/07	10.93
1981/10/08	11.51
1981/10/09	12.48
1981/10/10	19.20
1981/10/11	32.18
1981/10/12	18.44
1981/10/13	13.84
1981/10/14	10.64
1981/10/15	9.77
1981/10/16	11.80
1981/10/17	42.65
1981/10/18	57.20
1981/10/19	92.40
1981/10/20	93.20
1981/10/21	88.40
1981/10/22	33.62
1981/10/23	17.72
1981/10/24	15.92
1981/10/25	18.80
1981/10/26	45.52
1981/10/27	27.10
1981/10/28	40.00
1981/10/29	48.97
1981/10/30	24.95
1981/10/31	16.64
1981/11/01	11.51
1981/11/02	11.22
1981/11/03	10.93
1981/11/04	11.80
1981/11/05	13.50
1981/11/06	12.14
1981/11/07	11.22
1981/11/08	11.22
1981/11/09	11.22
1981/11/10	10.64
1981/11/11	16.28
1981/11/12	18.08
1981/11/13	10.35
1981/11/14	11.80
1981/11/15	14.52
1981/11/16	16.28
1981/11/17	47.83
1981/11/18	64.85
1981/11/19	99.60
1981/11/20	66.15
1981/11/21	24.95
1981/11/22	24.95
1981/11/23	29.86
1981/11/24	21.60
1981/11/25	20.40
1981/11/26	20.40
1981/11/27	20.80
1981/11/28	11.22
1981/11/29	28.02
1981/11/30	19.60
1981/12/01	18.08
1981/12/02	17.00
1981/12/03	14.18
1981/12/04	10.35
1981/12/05	9.48
1981/12/06	8.40
1981/12/07	7.65
1981/12/08	6.15
1981/12/09	5.15
1981/12/10	4.40
1981/12/11	4.15
1981/12/12	4.15
1981/12/13	3.90
1981/12/14	8.40
1981/12/15	9.90
1981/12/16	9.90
1981/12/17	9.10
1981/12/18	8.50
1981/12/19	5.26
1981/12/20	5.10
1981/12/21	5.74
1981/12/22	5.42
1981/12/23	5.74
1981/12/24	5.26
1981/12/25	5.10
1981/12/26	5.26
1981/12/27	5.10
1981/12/28	4.78
1981/12/29	4.46
1981/12/30	4.04
1981/12/31	4.17
#===========================================
# Number of observations = 365 / 365
# Average = 22.69