1981/01/01	11.40
1981/01/02	11.00
1981/01/03	11.00
1981/01/04	11.00
1981/01/05	11.00
1981/01/06	10.60
1981/01/07	11.00
1981/01/08	11.00
1981/01/09	11.40
1981/01/10	10.60
1981/01/11	10.20
1981/01/12	9.80
1981/01/13	9.80
1981/01/14	9.40
1981/01/15	9.40
1981/01/16	9.80
1981/01/17	9.40
1981/01/18	9.00
1981/01/19	9.00
1981/01/20	9.00
1981/01/21	9.00
1981/01/22	10.20
1981/01/23	10.60
1981/01/24	10.60
1981/01/25	10.60
1981/01/26	10.60
1981/01/27	8.20
1981/01/28	6.60
1981/01/29	6.20
1981/01/30	6.20
1981/01/31	6.20
1981/02/01	6.60
1981/02/02	6.60
1981/02/03	6.60
1981/02/04	6.60
1981/02/05	6.60
1981/02/06	6.60
1981/02/07	6.60
1981/02/08	6.60
1981/02/09	6.60
1981/02/10	6.60
1981/02/11	6.60
1981/02/12	6.60
1981/02/13	6.60
1981/02/14	6.60
1981/02/15	6.60
1981/02/16	6.60
1981/02/17	6.60
1981/02/18	6.60
1981/02/19	6.20
1981/02/20	6.20
1981/02/21	6.20
1981/02/22	6.20
1981/02/23	6.20
1981/02/24	6.20
1981/02/25	6.20
1981/02/26	6.20
1981/02/27	6.20
1981/02/28	6.60
1981/03/01	6.60
1981/03/02	6.60
1981/03/03	6.60
1981/03/04	6.60
1981/03/05	6.60
1981/03/06	6.20
1981/03/07	6.20
1981/03/08	6.20
1981/03/09	6.20
1981/03/10	6.20
1981/03/11	5.80
1981/03/12	5.80
1981/03/13	5.80
1981/03/14	5.80
1981/03/15	5.40
1981/03/16	5.40
1981/03/17	5.40
1981/03/18	5.40
1981/03/19	5.40
1981/03/20	5.40
1981/03/21	5.00
1981/03/22	5.00
1981/03/23	5.00
1981/03/24	5.00
1981/03/25	5.00
1981/03/26	5.00
1981/03/27	4.80
1981/03/28	4.80
1981/03/29	4.80
1981/03/30	4.80
1981/03/31	4.80
1981/04/01	-9999
1981/04/02	-9999
1981/04/03	-9999
1981/04/04	-9999
1981/04/05	-9999
1981/04/06	-9999
1981/04/07	-9999
1981/04/08	-9999
1981/04/09	-9999
1981/04/10	-9999
1981/04/11	-9999
1981/04/12	-9999
1981/04/13	-9999
1981/04/14	-9999
1981/04/15	-9999
1981/04/16	-9999
1981/04/17	-9999
1981/04/18	-9999
1981/04/19	1.68
1981/04/20	1.92
1981/04/21	2.16
1981/04/22	2.40
1981/04/23	1.92
1981/04/24	1.68
1981/04/25	1.68
1981/04/26	3.12
1981/04/27	15.50
1981/04/28	6.00
1981/04/29	2.76
1981/04/30	3.48
1981/05/01	3.12
1981/05/02	3.12
1981/05/03	3.84
1981/05/04	4.92
1981/05/05	5.64
1981/05/06	5.28
1981/05/07	4.92
1981/05/08	13.50
1981/05/09	10.50
1981/05/10	7.35
1981/05/11	6.45
1981/05/12	6.90
1981/05/13	8.70
1981/05/14	9.60
1981/05/15	8.70
1981/05/16	7.80
1981/05/17	6.90
1981/05/18	7.80
1981/05/19	10.50
1981/05/20	11.50
1981/05/21	14.50
1981/05/22	14.50
1981/05/23	20.90
1981/05/24	58.40
1981/05/25	242.00
1981/05/26	287.90
1981/05/27	153.20
1981/05/28	87.80
1981/05/29	71.40
1981/05/30	51.00
1981/05/31	40.25
1981/06/01	31.50
1981/06/02	25.40
1981/06/03	21.50
1981/06/04	19.70
1981/06/05	16.10
1981/06/06	13.50
1981/06/07	12.50
1981/06/08	12.00
1981/06/09	11.00
1981/06/10	10.50
1981/06/11	10.50
1981/06/12	8.70
1981/06/13	8.25
1981/06/14	8.70
1981/06/15	8.70
1981/06/16	6.90
1981/06/17	5.64
1981/06/18	5.28
1981/06/19	4.56
1981/06/20	4.92
1981/06/21	4.92
1981/06/22	5.28
1981/06/23	10.50
1981/06/24	17.30
1981/06/25	13.00
1981/06/26	12.50
1981/06/27	13.00
1981/06/28	17.30
1981/06/29	27.35
1981/06/30	22.15
1981/07/01	18.50
1981/07/02	12.50
1981/07/03	9.15
1981/07/04	6.90
1981/07/05	6.45
1981/07/06	7.35
1981/07/07	10.05
1981/07/08	155.90
1981/07/09	235.40
1981/07/10	129.50
1981/07/11	149.15
1981/07/12	178.50
1981/07/13	180.00
1981/07/14	165.45
1981/07/15	123.30
1981/07/16	90.00
1981/07/17	65.80
1981/07/18	52.85
1981/07/19	58.40
1981/07/20	52.85
1981/07/21	54.70
1981/07/22	84.50
1981/07/23	186.00
1981/07/24	227.15
1981/07/25	237.05
1981/07/26	228.80
1981/07/27	217.50
1981/07/28	247.10
1981/07/29	259.00
1981/07/30	243.70
1981/07/31	243.70
1981/08/01	259.00
1981/08/02	259.00
1981/08/03	199.90
1981/08/04	181.50
1981/08/05	220.70
1981/08/06	270.90
1981/08/07	411.00
1981/08/08	316.40
1981/08/09	250.50
1981/08/10	219.10
1981/08/11	184.50
1981/08/12	382.20
1981/08/13	395.50
1981/08/14	267.50
1981/08/15	209.50
1981/08/16	151.85
1981/08/17	116.10
1981/08/18	97.35
1981/08/19	72.35
1981/08/20	63.02
1981/08/21	79.00
1981/08/22	107.70
1981/08/23	96.30
1981/08/24	77.10
1981/08/25	73.30
1981/08/26	67.65
1981/08/27	56.55
1981/08/28	51.00
1981/08/29	51.00
1981/08/30	53.77
1981/08/31	45.90
1981/09/01	38.75
1981/09/02	42.50
1981/09/03	149.15
1981/09/04	151.85
1981/09/05	105.30
1981/09/06	92.10
1981/09/07	99.45
1981/09/08	154.55
1981/09/09	225.50
1981/09/10	193.50
1981/09/11	189.00
1981/09/12	172.70
1981/09/13	154.55
1981/09/14	142.40
1981/09/15	113.70
1981/09/16	67.65
1981/09/17	41.75
1981/09/18	35.75
1981/09/19	31.50
1981/09/20	26.70
1981/09/21	24.75
1981/09/22	22.80
1981/09/23	23.45
1981/09/24	21.50
1981/09/25	20.90
1981/09/26	38.00
1981/09/27	49.30
1981/09/28	48.45
1981/09/29	32.90
1981/09/30	30.80
1981/10/01	31.50
1981/10/02	30.10
1981/10/03	28.70
1981/10/04	22.15
1981/10/05	22.15
1981/10/06	25.40
1981/10/07	30.80
1981/10/08	35.00
1981/10/09	35.00
1981/10/10	41.00
1981/10/11	42.50
1981/10/12	156.50
1981/10/13	117.80
1981/10/14	91.00
1981/10/15	68.15
1981/10/16	54.70
1981/10/17	61.50
1981/10/18	108.60
1981/10/19	156.50
1981/10/20	170.00
1981/10/21	163.00
1981/10/22	150.00
1981/10/23	109.70
1981/10/24	72.00
1981/10/25	60.65
1981/10/26	57.25
1981/10/27	65.30
1981/10/28	69.10
1981/10/29	56.40
1981/10/30	70.05
1981/10/31	63.40
1981/11/01	43.70
1981/11/02	33.70
1981/11/03	27.55
1981/11/04	26.25
1981/11/05	25.60
1981/11/06	26.25
1981/11/07	30.90
1981/11/08	30.90
1981/11/09	30.90
1981/11/10	29.50
1981/11/11	29.50
1981/11/12	29.50
1981/11/13	38.90
1981/11/14	39.70
1981/11/15	36.50
1981/11/16	36.50
1981/11/17	44.50
1981/11/18	71.00
1981/11/19	126.20
1981/11/20	152.60
1981/11/21	144.80
1981/11/22	90.00
1981/11/23	67.20
1981/11/24	64.35
1981/11/25	53.85
1981/11/26	47.05
1981/11/27	43.70
1981/11/28	41.30
1981/11/29	36.50
1981/11/30	32.30
1981/12/01	39.70
1981/12/02	33.70
1981/12/03	30.90
1981/12/04	29.50
1981/12/05	27.55
1981/12/06	23.65
1981/12/07	20.60
1981/12/08	18.20
1981/12/09	17.00
1981/12/10	15.90
1981/12/11	15.35
1981/12/12	14.80
1981/12/13	14.25
1981/12/14	17.00
1981/12/15	17.60
1981/12/16	17.60
1981/12/17	18.20
1981/12/18	18.20
1981/12/19	25.60
1981/12/20	15.35
1981/12/21	11.50
1981/12/22	10.60
1981/12/23	10.60
1981/12/24	10.60
1981/12/25	10.60
1981/12/26	10.15
1981/12/27	9.25
1981/12/28	8.80
1981/12/29	8.35
1981/12/30	8.35
1981/12/31	7.90
#===========================================
# Number of observations = 347 / 365
# Average = 52.96