1981/01/01	11.30
1981/01/02	10.70
1981/01/03	10.10
1981/01/04	10.10
1981/01/05	9.80
1981/01/06	9.20
1981/01/07	8.90
1981/01/08	8.90
1981/01/09	8.60
1981/01/10	8.30
1981/01/11	8.30
1981/01/12	8.30
1981/01/13	7.80
1981/01/14	7.60
1981/01/15	7.40
1981/01/16	7.20
1981/01/17	7.20
1981/01/18	7.20
1981/01/19	7.00
1981/01/20	7.00
1981/01/21	7.00
1981/01/22	6.80
1981/01/23	6.80
1981/01/24	6.80
1981/01/25	6.80
1981/01/26	6.60
1981/01/27	6.40
1981/01/28	6.20
1981/01/29	6.00
1981/01/30	6.00
1981/01/31	5.80
1981/02/01	5.80
1981/02/02	5.80
1981/02/03	5.60
1981/02/04	5.40
1981/02/05	5.20
1981/02/06	5.20
1981/02/07	5.00
1981/02/08	5.00
1981/02/09	5.00
1981/02/10	5.00
1981/02/11	4.80
1981/02/12	4.60
1981/02/13	4.60
1981/02/14	4.60
1981/02/15	4.40
1981/02/16	4.40
1981/02/17	4.40
1981/02/18	4.20
1981/02/19	4.20
1981/02/20	4.00
1981/02/21	3.80
1981/02/22	3.80
1981/02/23	3.80
1981/02/24	3.80
1981/02/25	3.60
1981/02/26	3.60
1981/02/27	3.40
1981/02/28	3.40
1981/03/01	3.40
1981/03/02	3.20
1981/03/03	3.00
1981/03/04	3.00
1981/03/05	3.00
1981/03/06	3.00
1981/03/07	3.00
1981/03/08	2.80
1981/03/09	2.80
1981/03/10	2.80
1981/03/11	2.80
1981/03/12	2.80
1981/03/13	2.80
1981/03/14	2.60
1981/03/15	2.60
1981/03/16	2.60
1981/03/17	2.60
1981/03/18	2.60
1981/03/19	2.40
1981/03/20	2.40
1981/03/21	2.40
1981/03/22	2.20
1981/03/23	2.00
1981/03/24	1.90
1981/03/25	1.90
1981/03/26	1.90
1981/03/27	1.90
1981/03/28	1.90
1981/03/29	1.80
1981/03/30	1.80
1981/03/31	1.80
1981/04/01	3.40
1981/04/02	3.40
1981/04/03	3.40
1981/04/04	3.40
1981/04/05	3.40
1981/04/06	3.40
1981/04/07	3.40
1981/04/08	3.40
1981/04/09	3.40
1981/04/10	3.40
1981/04/11	3.40
1981/04/12	3.60
1981/04/13	4.00
1981/04/14	4.00
1981/04/15	4.00
1981/04/16	4.00
1981/04/17	3.80
1981/04/18	3.60
1981/04/19	3.60
1981/04/20	3.60
1981/04/21	3.60
1981/04/22	3.80
1981/04/23	4.00
1981/04/24	4.00
1981/04/25	3.60
1981/04/26	3.60
1981/04/27	3.60
1981/04/28	3.40
1981/04/29	3.40
1981/04/30	12.30
1981/05/01	18.60
1981/05/02	12.60
1981/05/03	9.60
1981/05/04	7.50
1981/05/05	6.30
1981/05/06	5.80
1981/05/07	5.40
1981/05/08	9.00
1981/05/09	15.00
1981/05/10	38.20
1981/05/11	26.20
1981/05/12	18.60
1981/05/13	17.00
1981/05/14	14.10
1981/05/15	22.60
1981/05/16	21.40
1981/05/17	14.70
1981/05/18	11.40
1981/05/19	11.70
1981/05/20	24.60
1981/05/21	57.40
1981/05/22	65.20
1981/05/23	61.70
1981/05/24	113.20
1981/05/25	752.50
1981/05/26	720.20
1981/05/27	408.50
1981/05/28	231.90
1981/05/29	159.10
1981/05/30	133.00
1981/05/31	123.10
1981/06/01	119.50
1981/06/02	131.20
1981/06/03	150.10
1981/06/04	135.70
1981/06/05	121.30
1981/06/06	98.00
1981/06/07	76.40
1981/06/08	64.50
1981/06/09	55.60
1981/06/10	47.80
1981/06/11	40.00
1981/06/12	41.80
1981/06/13	43.00
1981/06/14	46.00
1981/06/15	53.20
1981/06/16	47.80
1981/06/17	40.60
1981/06/18	46.60
1981/06/19	42.40
1981/06/20	45.40
1981/06/21	65.20
1981/06/22	73.60
1981/06/23	61.70
1981/06/24	61.00
1981/06/25	61.00
1981/06/26	83.60
1981/06/27	89.20
1981/06/28	78.50
1981/06/29	66.60
1981/06/30	55.60
1981/07/01	53.80
1981/07/02	47.20
1981/07/03	38.80
1981/07/04	31.00
1981/07/05	26.20
1981/07/06	25.40
1981/07/07	133.00
1981/07/08	1083.70
1981/07/09	1334.00
1981/07/10	1027.00
1981/07/11	453.50
1981/07/12	593.60
1981/07/13	659.00
1981/07/14	393.50
1981/07/15	248.60
1981/07/16	187.00
1981/07/17	178.00
1981/07/18	178.00
1981/07/19	181.00
1981/07/20	249.80
1981/07/21	579.20
1981/07/22	643.70
1981/07/23	915.70
1981/07/24	710.00
1981/07/25	437.00
1981/07/26	476.80
1981/07/27	757.60
1981/07/28	568.00
1981/07/29	468.80
1981/07/30	407.00
1981/07/31	404.00
1981/08/01	588.80
1981/08/02	653.90
1981/08/03	497.60
1981/08/04	373.60
1981/08/05	322.60
1981/08/06	568.00
1981/08/07	993.00
1981/08/08	1066.90
1981/08/09	745.70
1981/08/10	491.20
1981/08/11	395.00
1981/08/12	642.00
1981/08/13	1039.60
1981/08/14	674.30
1981/08/15	426.50
1981/08/16	309.60
1981/08/17	240.20
1981/08/18	197.00
1981/08/19	207.70
1981/08/20	246.20
1981/08/21	341.40
1981/08/22	465.60
1981/08/23	330.40
1981/08/24	241.40
1981/08/25	202.20
1981/08/26	219.80
1981/08/27	225.30
1981/08/28	197.00
1981/08/29	174.00
1981/08/30	162.00
1981/08/31	155.50
1981/09/01	133.00
1981/09/02	122.20
1981/09/03	377.80
1981/09/04	584.00
1981/09/05	369.40
1981/09/06	288.80
1981/09/07	320.00
1981/09/08	329.10
1981/09/09	355.40
1981/09/10	204.40
1981/09/11	243.80
1981/09/12	199.00
1981/09/13	172.00
1981/09/14	166.00
1981/09/15	157.30
1981/09/16	133.90
1981/09/17	115.90
1981/09/18	106.00
1981/09/19	111.40
1981/09/20	111.40
1981/09/21	105.20
1981/09/22	97.20
1981/09/23	94.00
1981/09/24	109.60
1981/09/25	122.20
1981/09/26	117.70
1981/09/27	120.40
1981/09/28	109.60
1981/09/29	97.20
1981/09/30	90.00
1981/10/01	82.00
1981/10/02	80.60
1981/10/03	88.40
1981/10/04	93.20
1981/10/05	94.00
1981/10/06	124.00
1981/10/07	146.50
1981/10/08	153.70
1981/10/09	180.00
1981/10/10	163.00
1981/10/11	265.40
1981/10/12	359.60
1981/10/13	432.50
1981/10/14	282.30
1981/10/15	190.00
1981/10/16	163.00
1981/10/17	170.00
1981/10/18	252.20
1981/10/19	314.80
1981/10/20	317.40
1981/10/21	320.00
1981/10/22	246.20
1981/10/23	196.00
1981/10/24	170.00
1981/10/25	166.00
1981/10/26	151.00
1981/10/27	149.20
1981/10/28	141.10
1981/10/29	143.80
1981/10/30	125.80
1981/10/31	107.80
1981/11/01	96.40
1981/11/02	88.40
1981/11/03	83.60
1981/11/04	80.60
1981/11/05	76.40
1981/11/06	82.80
1981/11/07	81.30
1981/11/08	77.80
1981/11/09	74.30
1981/11/10	72.20
1981/11/11	69.40
1981/11/12	68.00
1981/11/13	64.50
1981/11/14	61.70
1981/11/15	64.50
1981/11/16	67.30
1981/11/17	77.10
1981/11/18	104.40
1981/11/19	150.10
1981/11/20	271.40
1981/11/21	251.00
1981/11/22	175.00
1981/11/23	136.60
1981/11/24	123.10
1981/11/25	100.40
1981/11/26	90.00
1981/11/27	82.80
1981/11/28	77.80
1981/11/29	72.90
1981/11/30	68.00
1981/12/01	64.50
1981/12/02	61.00
1981/12/03	58.60
1981/12/04	55.60
1981/12/05	54.40
1981/12/06	52.00
1981/12/07	50.20
1981/12/08	49.00
1981/12/09	47.20
1981/12/10	45.40
1981/12/11	43.60
1981/12/12	41.80
1981/12/13	40.00
1981/12/14	38.80
1981/12/15	37.60
1981/12/16	36.00
1981/12/17	35.00
1981/12/18	33.50
1981/12/19	32.00
1981/12/20	31.00
1981/12/21	29.50
1981/12/22	28.50
1981/12/23	27.00
1981/12/24	26.20
1981/12/25	25.80
1981/12/26	25.80
1981/12/27	25.00
1981/12/28	24.20
1981/12/29	23.40
1981/12/30	23.00
1981/12/31	23.00
#===========================================
# Number of observations = 365 / 365
# Average = 132.71