1981/01/01	46.40
1981/01/02	45.05
1981/01/03	45.05
1981/01/04	43.70
1981/01/05	43.70
1981/01/06	43.70
1981/01/07	42.35
1981/01/08	42.35
1981/01/09	41.00
1981/01/10	41.00
1981/01/11	41.00
1981/01/12	39.85
1981/01/13	39.85
1981/01/14	39.85
1981/01/15	38.70
1981/01/16	38.70
1981/01/17	38.70
1981/01/18	37.55
1981/01/19	37.55
1981/01/20	37.55
1981/01/21	36.40
1981/01/22	36.40
1981/01/23	36.40
1981/01/24	36.40
1981/01/25	36.40
1981/01/26	35.25
1981/01/27	35.25
1981/01/28	34.10
1981/01/29	34.10
1981/01/30	32.95
1981/01/31	32.95
1981/02/01	32.95
1981/02/02	32.95
1981/02/03	32.95
1981/02/04	32.95
1981/02/05	32.95
1981/02/06	31.80
1981/02/07	30.65
1981/02/08	30.65
1981/02/09	30.65
1981/02/10	29.50
1981/02/11	29.50
1981/02/12	28.35
1981/02/13	28.35
1981/02/14	27.20
1981/02/15	26.05
1981/02/16	26.05
1981/02/17	24.90
1981/02/18	24.90
1981/02/19	23.75
1981/02/20	23.75
1981/02/21	23.75
1981/02/22	23.75
1981/02/23	23.75
1981/02/24	23.75
1981/02/25	23.75
1981/02/26	22.60
1981/02/27	22.60
1981/02/28	22.60
1981/03/01	22.60
1981/03/02	20.30
1981/03/03	21.45
1981/03/04	21.45
1981/03/05	21.45
1981/03/06	21.45
1981/03/07	21.45
1981/03/08	21.45
1981/03/09	23.75
1981/03/10	21.45
1981/03/11	21.45
1981/03/12	22.60
1981/03/13	21.45
1981/03/14	20.30
1981/03/15	19.15
1981/03/16	18.00
1981/03/17	18.00
1981/03/18	17.10
1981/03/19	17.10
1981/03/20	17.10
1981/03/21	17.10
1981/03/22	17.10
1981/03/23	16.20
1981/03/24	16.20
1981/03/25	15.30
1981/03/26	15.30
1981/03/27	15.30
1981/03/28	15.30
1981/03/29	15.30
1981/03/30	15.30
1981/03/31	15.30
1981/04/01	15.30
1981/04/02	18.00
1981/04/03	19.80
1981/04/04	17.10
1981/04/05	16.20
1981/04/06	15.30
1981/04/07	15.30
1981/04/08	14.40
1981/04/09	13.50
1981/04/10	13.50
1981/04/11	13.50
1981/04/12	13.50
1981/04/13	14.40
1981/04/14	14.40
1981/04/15	16.20
1981/04/16	17.10
1981/04/17	18.90
1981/04/18	21.60
1981/04/19	24.30
1981/04/20	28.00
1981/04/21	22.50
1981/04/22	20.70
1981/04/23	19.80
1981/04/24	21.60
1981/04/25	20.70
1981/04/26	31.00
1981/04/27	37.00
1981/04/28	35.00
1981/04/29	32.00
1981/04/30	28.00
1981/05/01	23.40
1981/05/02	25.20
1981/05/03	32.00
1981/05/04	37.00
1981/05/05	117.50
1981/05/06	80.20
1981/05/07	55.00
1981/05/08	39.40
1981/05/09	36.00
1981/05/10	36.00
1981/05/11	47.80
1981/05/12	41.80
1981/05/13	33.00
1981/05/14	34.00
1981/05/15	40.60
1981/05/16	74.20
1981/05/17	96.20
1981/05/18	119.00
1981/05/19	94.80
1981/05/20	69.40
1981/05/21	57.40
1981/05/22	179.40
1981/05/23	301.10
1981/05/24	245.20
1981/05/25	144.60
1981/05/26	140.00
1981/05/27	119.00
1981/05/28	90.60
1981/05/29	147.80
1981/05/30	209.20
1981/05/31	170.90
1981/06/01	103.20
1981/06/02	79.00
1981/06/03	87.80
1981/06/04	92.00
1981/06/05	77.80
1981/06/06	67.00
1981/06/07	58.60
1981/06/08	55.00
1981/06/09	57.40
1981/06/10	57.40
1981/06/11	51.40
1981/06/12	47.80
1981/06/13	45.40
1981/06/14	44.20
1981/06/15	43.00
1981/06/16	45.40
1981/06/17	59.80
1981/06/18	65.80
1981/06/19	64.60
1981/06/20	110.20
1981/06/21	179.40
1981/06/22	132.50
1981/06/23	126.50
1981/06/24	236.20
1981/06/25	416.60
1981/06/26	472.40
1981/06/27	299.20
1981/06/28	187.90
1981/06/29	157.40
1981/06/30	128.00
1981/07/01	111.60
1981/07/02	100.40
1981/07/03	87.80
1981/07/04	90.60
1981/07/05	558.40
1981/07/06	3209.40
1981/07/07	5647.16
1981/07/08	3715.00
1981/07/09	2264.90
1981/07/10	1510.60
1981/07/11	1438.40
1981/07/12	1011.78
1981/07/13	743.27
1981/07/14	628.60
1981/07/15	525.50
1981/07/16	495.40
1981/07/17	474.70
1981/07/18	751.87
1981/07/19	1148.00
1981/07/20	863.66
1981/07/21	780.53
1981/07/22	720.33
1981/07/23	610.40
1981/07/24	563.60
1981/07/25	786.27
1981/07/26	670.90
1981/07/27	928.06
1981/07/28	695.20
1981/07/29	723.20
1981/07/30	789.13
1981/07/31	863.66
1981/08/01	835.40
1981/08/02	717.47
1981/08/03	623.40
1981/08/04	726.07
1981/08/05	1278.00
1981/08/06	1404.20
1981/08/07	969.92
1981/08/08	789.13
1981/08/09	668.20
1981/08/10	589.60
1981/08/11	792.00
1981/08/12	746.13
1981/08/13	641.60
1981/08/14	528.00
1981/08/15	486.20
1981/08/16	490.80
1981/08/17	467.80
1981/08/18	434.20
1981/08/19	613.00
1981/08/20	600.00
1981/08/21	613.00
1981/08/22	481.60
1981/08/23	427.60
1981/08/24	432.00
1981/08/25	396.80
1981/08/26	355.00
1981/08/27	350.60
1981/08/28	472.40
1981/08/29	449.60
1981/08/30	361.60
1981/08/31	339.80
1981/09/01	605.20
1981/09/02	628.60
1981/09/03	835.40
1981/09/04	823.00
1981/09/05	850.90
1981/09/06	863.66
1981/09/07	1043.00
1981/09/08	918.40
1981/09/09	703.30
1981/09/10	594.80
1981/09/11	703.30
1981/09/12	523.00
1981/09/13	451.80
1981/09/14	396.80
1981/09/15	357.20
1981/09/16	368.20
1981/09/17	331.40
1981/09/18	297.30
1981/09/19	272.60
1981/09/20	272.60
1981/09/21	261.40
1981/09/22	241.60
1981/09/23	227.20
1981/09/24	212.80
1981/09/25	200.20
1981/09/26	189.60
1981/09/27	186.20
1981/09/28	182.80
1981/09/29	170.90
1981/09/30	157.40
1981/10/01	155.80
1981/10/02	155.80
1981/10/03	170.90
1981/10/04	191.30
1981/10/05	274.50
1981/10/06	460.90
1981/10/07	297.30
1981/10/08	282.10
1981/10/09	257.80
1981/10/10	230.80
1981/10/11	254.20
1981/10/12	229.00
1981/10/13	209.20
1981/10/14	202.00
1981/10/15	189.60
1981/10/16	169.20
1981/10/17	187.90
1981/10/18	239.80
1981/10/19	278.30
1981/10/20	245.20
1981/10/21	202.00
1981/10/22	184.50
1981/10/23	177.70
1981/10/24	169.20
1981/10/25	169.20
1981/10/26	169.20
1981/10/27	194.80
1981/10/28	162.40
1981/10/29	146.20
1981/10/30	137.00
1981/10/31	134.00
1981/11/01	128.00
1981/11/02	123.50
1981/11/03	119.00
1981/11/04	116.00
1981/11/05	128.00
1981/11/06	116.00
1981/11/07	110.20
1981/11/08	111.60
1981/11/09	107.40
1981/11/10	106.00
1981/11/11	101.80
1981/11/12	99.00
1981/11/13	96.20
1981/11/14	97.60
1981/11/15	100.40
1981/11/16	103.20
1981/11/17	100.40
1981/11/18	129.50
1981/11/19	164.10
1981/11/20	123.50
1981/11/21	106.00
1981/11/22	99.00
1981/11/23	93.40
1981/11/24	92.00
1981/11/25	90.60
1981/11/26	87.80
1981/11/27	85.00
1981/11/28	82.60
1981/11/29	80.20
1981/11/30	77.80
1981/12/01	76.60
1981/12/02	74.20
1981/12/03	71.80
1981/12/04	71.80
1981/12/05	71.80
1981/12/06	70.60
1981/12/07	69.40
1981/12/08	68.20
1981/12/09	67.00
1981/12/10	67.00
1981/12/11	67.00
1981/12/12	65.80
1981/12/13	65.80
1981/12/14	65.80
1981/12/15	64.60
1981/12/16	65.80
1981/12/17	64.60
1981/12/18	62.20
1981/12/19	61.00
1981/12/20	59.80
1981/12/21	58.60
1981/12/22	57.40
1981/12/23	56.20
1981/12/24	55.00
1981/12/25	55.00
1981/12/26	55.00
1981/12/27	55.00
1981/12/28	53.80
1981/12/29	52.60
1981/12/30	52.60
1981/12/31	51.40
#===========================================
# Number of observations = 365 / 365
# Average = 240.75