1981/01/01	48.00
1981/01/02	79.50
1981/01/03	136.60
1981/01/04	111.00
1981/01/05	49.50
1981/01/06	10.40
1981/01/07	46.50
1981/01/08	32.00
1981/01/09	9.20
1981/01/10	24.80
1981/01/11	120.00
1981/01/12	180.60
1981/01/13	198.40
1981/01/14	178.90
1981/01/15	124.50
1981/01/16	91.50
1981/01/17	91.50
1981/01/18	90.00
1981/01/19	72.00
1981/01/20	30.80
1981/01/21	10.40
1981/01/22	11.60
1981/01/23	22.40
1981/01/24	64.50
1981/01/25	152.60
1981/01/26	124.50
1981/01/27	87.00
1981/01/28	91.50
1981/01/29	82.50
1981/01/30	35.90
1981/01/31	76.50
1981/02/01	126.00
1981/02/02	121.50
1981/02/03	189.40
1981/02/04	218.20
1981/02/05	184.00
1981/02/06	147.80
1981/02/07	129.00
1981/02/08	144.60
1981/02/09	115.50
1981/02/10	108.00
1981/02/11	106.50
1981/02/12	97.50
1981/02/13	126.00
1981/02/14	146.20
1981/02/15	173.80
1981/02/16	232.60
1981/02/17	257.80
1981/02/18	200.20
1981/02/19	106.50
1981/02/20	63.00
1981/02/21	99.00
1981/02/22	108.00
1981/02/23	102.00
1981/02/24	117.00
1981/02/25	115.50
1981/02/26	106.50
1981/02/27	147.80
1981/02/28	193.00
1981/03/01	227.20
1981/03/02	220.00
1981/03/03	196.60
1981/03/04	185.80
1981/03/05	175.50
1981/03/06	167.00
1981/03/07	172.10
1981/03/08	177.20
1981/03/09	170.40
1981/03/10	187.60
1981/03/11	178.90
1981/03/12	154.20
1981/03/13	167.00
1981/03/14	180.60
1981/03/15	198.40
1981/03/16	203.80
1981/03/17	239.80
1981/03/18	227.20
1981/03/19	182.30
1981/03/20	189.40
1981/03/21	194.80
1981/03/22	205.60
1981/03/23	203.80
1981/03/24	187.60
1981/03/25	200.20
1981/03/26	189.40
1981/03/27	154.20
1981/03/28	189.40
1981/03/29	216.40
1981/03/30	239.80
1981/03/31	239.80
1981/04/01	216.40
1981/04/02	229.00
1981/04/03	216.40
1981/04/04	218.20
1981/04/05	207.40
1981/04/06	245.20
1981/04/07	254.20
1981/04/08	230.80
1981/04/09	209.20
1981/04/10	207.40
1981/04/11	232.60
1981/04/12	266.80
1981/04/13	277.60
1981/04/14	292.00
1981/04/15	299.60
1981/04/16	236.20
1981/04/17	154.20
1981/04/18	165.40
1981/04/19	254.20
1981/04/20	281.20
1981/04/21	259.60
1981/04/22	234.40
1981/04/23	254.20
1981/04/24	263.20
1981/04/25	279.40
1981/04/26	272.20
1981/04/27	286.60
1981/04/28	320.50
1981/04/29	301.50
1981/04/30	268.60
1981/05/01	311.00
1981/05/02	342.00
1981/05/03	318.60
1981/05/04	245.20
1981/05/05	221.80
1981/05/06	239.80
1981/05/07	263.20
1981/05/08	307.20
1981/05/09	332.00
1981/05/10	350.00
1981/05/11	346.00
1981/05/12	342.00
1981/05/13	261.40
1981/05/14	227.20
1981/05/15	259.60
1981/05/16	292.00
1981/05/17	309.10
1981/05/18	286.60
1981/05/19	252.40
1981/05/20	203.80
1981/05/21	203.80
1981/05/22	225.40
1981/05/23	279.40
1981/05/24	330.00
1981/05/25	442.00
1981/05/26	382.00
1981/05/27	599.30
1981/05/28	572.00
1981/05/29	593.00
1981/05/30	614.00
1981/05/31	632.90
1981/06/01	632.90
1981/06/02	622.40
1981/06/03	546.80
1981/06/04	486.00
1981/06/05	506.00
1981/06/06	561.50
1981/06/07	590.90
1981/06/08	626.60
1981/06/09	647.60
1981/06/10	605.60
1981/06/11	572.00
1981/06/12	586.70
1981/06/13	586.70
1981/06/14	559.40
1981/06/15	561.50
1981/06/16	574.10
1981/06/17	555.20
1981/06/18	514.00
1981/06/19	418.00
1981/06/20	514.00
1981/06/21	524.00
1981/06/22	486.00
1981/06/23	438.00
1981/06/24	408.00
1981/06/25	350.00
1981/06/26	392.00
1981/06/27	430.00
1981/06/28	464.00
1981/06/29	466.00
1981/06/30	474.00
1981/07/01	266.80
1981/07/02	250.60
1981/07/03	256.00
1981/07/04	301.50
1981/07/05	334.00
1981/07/06	265.00
1981/07/07	284.80
1981/07/08	283.00
1981/07/09	338.00
1981/07/10	618.20
1981/07/11	704.30
1981/07/12	645.50
1981/07/13	588.80
1981/07/14	563.60
1981/07/15	514.00
1981/07/16	426.00
1981/07/17	466.00
1981/07/18	510.00
1981/07/19	512.00
1981/07/20	494.00
1981/07/21	442.00
1981/07/22	454.00
1981/07/23	620.30
1981/07/24	760.80
1981/07/25	888.40
1981/07/26	914.80
1981/07/27	912.60
1981/07/28	884.00
1981/07/29	837.80
1981/07/30	811.40
1981/07/31	862.00
1981/08/01	914.80
1981/08/02	950.00
1981/08/03	978.60
1981/08/04	1012.90
1981/08/05	1057.80
1981/08/06	1084.20
1981/08/07	1117.80
1981/08/08	1137.00
1981/08/09	1165.80
1981/08/10	1182.60
1981/08/11	1194.60
1981/08/12	1197.00
1981/08/13	1206.60
1981/08/14	1213.80
1981/08/15	1216.20
1981/08/16	1228.20
1981/08/17	1235.40
1981/08/18	1237.80
1981/08/19	1233.00
1981/08/20	1225.80
1981/08/21	1218.60
1981/08/22	1211.40
1981/08/23	1209.00
1981/08/24	1216.20
1981/08/25	1209.00
1981/08/26	1194.60
1981/08/27	1163.40
1981/08/28	1137.00
1981/08/29	1057.80
1981/08/30	1091.40
1981/08/31	1069.80
1981/09/01	1055.40
1981/09/02	1012.90
1981/09/03	974.20
1981/09/04	1006.00
1981/09/05	1077.00
1981/09/06	1105.80
1981/09/07	1125.00
1981/09/08	1141.80
1981/09/09	1151.40
1981/09/10	1149.00
1981/09/11	1151.40
1981/09/12	1156.20
1981/09/13	1165.80
1981/09/14	1146.60
1981/09/15	1098.60
1981/09/16	1008.30
1981/09/17	963.20
1981/09/18	939.00
1981/09/19	906.00
1981/09/20	886.20
1981/09/21	809.20
1981/09/22	763.00
1981/09/23	745.40
1981/09/24	725.60
1981/09/25	747.60
1981/09/26	793.80
1981/09/27	809.20
1981/09/28	815.80
1981/09/29	796.00
1981/09/30	754.20
1981/10/01	656.00
1981/10/02	668.60
1981/10/03	691.70
1981/10/04	741.00
1981/10/05	767.40
1981/10/06	747.60
1981/10/07	656.00
1981/10/08	586.70
1981/10/09	586.70
1981/10/10	624.50
1981/10/11	664.40
1981/10/12	672.80
1981/10/13	664.40
1981/10/14	632.90
1981/10/15	565.70
1981/10/16	510.00
1981/10/17	460.00
1981/10/18	438.00
1981/10/19	462.00
1981/10/20	508.00
1981/10/21	551.00
1981/10/22	563.60
1981/10/23	609.80
1981/10/24	626.60
1981/10/25	628.70
1981/10/26	580.40
1981/10/27	506.00
1981/10/28	468.00
1981/10/29	390.00
1981/10/30	420.00
1981/10/31	490.00
1981/11/01	520.00
1981/11/02	536.30
1981/11/03	544.70
1981/11/04	530.00
1981/11/05	512.00
1981/11/06	540.50
1981/11/07	582.50
1981/11/08	620.30
1981/11/09	645.50
1981/11/10	804.80
1981/11/11	778.40
1981/11/12	730.00
1981/11/13	687.50
1981/11/14	672.80
1981/11/15	658.10
1981/11/16	607.70
1981/11/17	597.20
1981/11/18	586.70
1981/11/19	584.60
1981/11/20	687.50
1981/11/21	785.00
1981/11/22	800.40
1981/11/23	824.60
1981/11/24	848.80
1981/11/25	835.60
1981/11/26	809.20
1981/11/27	824.60
1981/11/28	835.60
1981/11/29	831.20
1981/11/30	820.20
1981/12/01	798.20
1981/12/02	765.20
1981/12/03	712.70
1981/12/04	695.90
1981/12/05	653.90
1981/12/06	590.90
1981/12/07	534.20
1981/12/08	490.00
1981/12/09	428.00
1981/12/10	380.00
1981/12/11	352.00
1981/12/12	350.00
1981/12/13	326.20
1981/12/14	312.90
1981/12/15	346.00
1981/12/16	362.00
1981/12/17	318.60
1981/12/18	316.70
1981/12/19	303.40
1981/12/20	292.00
1981/12/21	295.80
1981/12/22	297.70
1981/12/23	279.40
1981/12/24	230.80
1981/12/25	211.00
1981/12/26	196.60
1981/12/27	167.00
1981/12/28	168.70
1981/12/29	143.00
1981/12/30	139.80
1981/12/31	105.00
#===========================================
# Number of observations = 365 / 365
# Average = 487.98