1981/01/01	27.25
1981/01/02	26.70
1981/01/03	26.15
1981/01/04	24.50
1981/01/05	22.85
1981/01/06	22.30
1981/01/07	20.65
1981/01/08	19.55
1981/01/09	19.00
1981/01/10	18.45
1981/01/11	17.90
1981/01/12	17.90
1981/01/13	17.35
1981/01/14	17.35
1981/01/15	17.35
1981/01/16	16.80
1981/01/17	16.80
1981/01/18	16.25
1981/01/19	16.25
1981/01/20	16.25
1981/01/21	16.80
1981/01/22	16.80
1981/01/23	16.80
1981/01/24	16.25
1981/01/25	15.70
1981/01/26	15.15
1981/01/27	14.60
1981/01/28	14.60
1981/01/29	14.05
1981/01/30	14.05
1981/01/31	13.50
1981/02/01	13.50
1981/02/02	12.95
1981/02/03	12.40
1981/02/04	12.95
1981/02/05	12.40
1981/02/06	12.40
1981/02/07	11.30
1981/02/08	11.85
1981/02/09	11.85
1981/02/10	11.85
1981/02/11	11.85
1981/02/12	10.20
1981/02/13	9.65
1981/02/14	9.10
1981/02/15	8.00
1981/02/16	7.70
1981/02/17	7.40
1981/02/18	7.10
1981/02/19	7.40
1981/02/20	7.70
1981/02/21	7.70
1981/02/22	7.70
1981/02/23	7.40
1981/02/24	7.40
1981/02/25	7.10
1981/02/26	6.80
1981/02/27	6.50
1981/02/28	5.90
1981/03/01	5.90
1981/03/02	5.60
1981/03/03	5.60
1981/03/04	5.00
1981/03/05	5.00
1981/03/06	4.80
1981/03/07	4.80
1981/03/08	5.30
1981/03/09	4.80
1981/03/10	4.80
1981/03/11	4.60
1981/03/12	4.60
1981/03/13	4.40
1981/03/14	5.30
1981/03/15	5.30
1981/03/16	5.30
1981/03/17	5.30
1981/03/18	5.00
1981/03/19	4.80
1981/03/20	4.80
1981/03/21	4.80
1981/03/22	4.60
1981/03/23	4.80
1981/03/24	4.80
1981/03/25	4.80
1981/03/26	4.80
1981/03/27	4.60
1981/03/28	4.80
1981/03/29	4.40
1981/03/30	4.40
1981/03/31	4.40
1981/04/01	1.80
1981/04/02	1.80
1981/04/03	1.70
1981/04/04	1.70
1981/04/05	1.70
1981/04/06	1.70
1981/04/07	1.60
1981/04/08	1.50
1981/04/09	1.40
1981/04/10	1.30
1981/04/11	1.30
1981/04/12	1.20
1981/04/13	1.30
1981/04/14	1.40
1981/04/15	1.40
1981/04/16	1.60
1981/04/17	1.70
1981/04/18	1.90
1981/04/19	1.80
1981/04/20	1.80
1981/04/21	1.50
1981/04/22	1.50
1981/04/23	1.50
1981/04/24	1.50
1981/04/25	1.50
1981/04/26	1.60
1981/04/27	1.80
1981/04/28	1.60
1981/04/29	1.50
1981/04/30	1.30
1981/05/01	1.30
1981/05/02	1.20
1981/05/03	1.20
1981/05/04	1.30
1981/05/05	16.40
1981/05/06	29.60
1981/05/07	22.00
1981/05/08	11.60
1981/05/09	8.80
1981/05/10	7.60
1981/05/11	6.00
1981/05/12	5.40
1981/05/13	4.60
1981/05/14	3.80
1981/05/15	3.60
1981/05/16	3.40
1981/05/17	3.40
1981/05/18	3.80
1981/05/19	5.00
1981/05/20	8.80
1981/05/21	20.40
1981/05/22	30.50
1981/05/23	81.60
1981/05/24	191.00
1981/05/25	192.80
1981/05/26	224.00
1981/05/27	250.00
1981/05/28	216.20
1981/05/29	187.40
1981/05/30	162.80
1981/05/31	154.80
1981/06/01	130.80
1981/06/02	126.00
1981/06/03	159.60
1981/06/04	151.60
1981/06/05	126.00
1981/06/06	105.00
1981/06/07	89.40
1981/06/08	71.80
1981/06/09	79.00
1981/06/10	94.60
1981/06/11	105.00
1981/06/12	90.70
1981/06/13	81.60
1981/06/14	71.80
1981/06/15	68.20
1981/06/16	65.80
1981/06/17	57.40
1981/06/18	57.40
1981/06/19	77.80
1981/06/20	73.00
1981/06/21	59.80
1981/06/22	57.40
1981/06/23	56.20
1981/06/24	55.00
1981/06/25	50.00
1981/06/26	40.00
1981/06/27	35.00
1981/06/28	42.00
1981/06/29	44.00
1981/06/30	38.00
1981/07/01	31.40
1981/07/02	26.00
1981/07/03	24.40
1981/07/04	20.40
1981/07/05	16.40
1981/07/06	18.80
1981/07/07	55.00
1981/07/08	203.60
1981/07/09	324.00
1981/07/10	338.00
1981/07/11	264.00
1981/07/12	192.80
1981/07/13	148.40
1981/07/14	105.00
1981/07/15	76.60
1981/07/16	61.00
1981/07/17	61.00
1981/07/18	93.30
1981/07/19	137.20
1981/07/20	129.20
1981/07/21	153.20
1981/07/22	286.00
1981/07/23	348.50
1981/07/24	340.10
1981/07/25	292.00
1981/07/26	260.00
1981/07/27	240.00
1981/07/28	214.40
1981/07/29	222.00
1981/07/30	240.00
1981/07/31	258.00
1981/08/01	304.00
1981/08/02	359.00
1981/08/03	408.60
1981/08/04	429.50
1981/08/05	422.40
1981/08/06	399.40
1981/08/07	399.40
1981/08/08	417.80
1981/08/09	417.80
1981/08/10	394.80
1981/08/11	363.40
1981/08/12	417.80
1981/08/13	459.50
1981/08/14	479.51
1981/08/15	479.51
1981/08/16	427.00
1981/08/17	340.10
1981/08/18	258.00
1981/08/19	209.00
1981/08/20	224.00
1981/08/21	272.00
1981/08/22	306.00
1981/08/23	298.00
1981/08/24	286.00
1981/08/25	266.00
1981/08/26	230.00
1981/08/27	183.80
1981/08/28	151.60
1981/08/29	132.40
1981/08/30	126.00
1981/08/31	116.70
1981/09/01	114.10
1981/09/02	174.00
1981/09/03	296.00
1981/09/04	308.00
1981/09/05	300.00
1981/09/06	292.00
1981/09/07	318.00
1981/09/08	381.00
1981/09/09	429.50
1981/09/10	474.50
1981/09/11	499.50
1981/09/12	469.50
1981/09/13	397.10
1981/09/14	326.00
1981/09/15	256.00
1981/09/16	203.60
1981/09/17	162.80
1981/09/18	146.80
1981/09/19	134.00
1981/09/20	127.60
1981/09/21	159.60
1981/09/22	167.60
1981/09/23	161.20
1981/09/24	151.60
1981/09/25	153.20
1981/09/26	154.80
1981/09/27	156.40
1981/09/28	142.00
1981/09/29	126.00
1981/09/30	126.00
1981/10/01	115.40
1981/10/02	105.00
1981/10/03	97.20
1981/10/04	89.40
1981/10/05	92.00
1981/10/06	99.80
1981/10/07	94.60
1981/10/08	88.10
1981/10/09	92.00
1981/10/10	107.60
1981/10/11	150.00
1981/10/12	187.40
1981/10/13	164.40
1981/10/14	145.20
1981/10/15	143.60
1981/10/16	132.40
1981/10/17	145.20
1981/10/18	189.20
1981/10/19	244.00
1981/10/20	234.00
1981/10/21	209.00
1981/10/22	191.00
1981/10/23	167.60
1981/10/24	153.20
1981/10/25	143.60
1981/10/26	138.80
1981/10/27	130.80
1981/10/28	137.20
1981/10/29	126.00
1981/10/30	114.10
1981/10/31	97.20
1981/11/01	89.40
1981/11/02	86.80
1981/11/03	84.20
1981/11/04	80.30
1981/11/05	75.40
1981/11/06	75.40
1981/11/07	77.80
1981/11/08	84.20
1981/11/09	112.80
1981/11/10	167.60
1981/11/11	201.80
1981/11/12	178.80
1981/11/13	154.80
1981/11/14	143.60
1981/11/15	142.00
1981/11/16	172.40
1981/11/17	288.00
1981/11/18	359.00
1981/11/19	420.10
1981/11/20	449.51
1981/11/21	394.80
1981/11/22	324.00
1981/11/23	268.00
1981/11/24	224.00
1981/11/25	192.80
1981/11/26	169.20
1981/11/27	150.00
1981/11/28	143.60
1981/11/29	142.00
1981/11/30	134.00
1981/12/01	127.60
1981/12/02	118.00
1981/12/03	108.90
1981/12/04	103.70
1981/12/05	101.10
1981/12/06	97.20
1981/12/07	92.00
1981/12/08	90.70
1981/12/09	85.50
1981/12/10	81.60
1981/12/11	80.30
1981/12/12	79.00
1981/12/13	79.00
1981/12/14	85.50
1981/12/15	110.20
1981/12/16	112.80
1981/12/17	110.20
1981/12/18	99.80
1981/12/19	92.00
1981/12/20	85.50
1981/12/21	82.90
1981/12/22	81.60
1981/12/23	80.30
1981/12/24	79.00
1981/12/25	69.40
1981/12/26	59.80
1981/12/27	57.40
1981/12/28	55.00
1981/12/29	54.00
1981/12/30	50.00
1981/12/31	49.00
#===========================================
# Number of observations = 365 / 365
# Average = 110.38