date,EW,VW 19800630,0.053875,0.210276 19800930,0.015671,0.033562 19801231,0.022737,-0.031287 19810331,0.486312,0.135672 19810630,0.004115,0.009411 19810930,0.138932,0.10131 19811231,0.059996,0.030565 19820331,0.005836,-0.107887 19820630,0.072693,0.028747 19820930,-0.065854,-0.040708 19821231,-0.042033,-0.014636 19830331,0.4048,0.396267 19830630,0.094271,0.233427 19830930,0.150678,0.17526 19831231,0.112843,0.065702 19840331,0.385498,0.271346 19840630,-0.092418,-0.063485 19840930,0.074932,0.07039 19841231,0.112437,0.107288 19850331,0.077328,0.065726 19850630,0.010487,0.042079 19850930,0.097907,0.113652 19851231,0.108066,0.136093 19860331,-0.044264,-0.071181 19860630,-0.025157,0.072719 19860930,0.022263,0.034774 19861231,-0.012689,-0.001292 19870331,0.067862,0.11704 19870630,0.08499,0.132743 19870930,0.231375,0.301369 19871231,-0.315572,-0.360096 19880331,0.140988,0.21139 19880630,-0.059517,0.048288 19880930,-0.014172,-0.000237 19881231,0.167587,0.211672 19890331,0.257673,0.356233 19890630,0.084184,0.097019 19890930,0.110461,0.114434 19891231,-0.007993,0.028636 19900331,0.207082,0.20452 19900630,-0.006118,-0.013366 19900930,-0.107002,-0.031193 19901231,-0.138361,-0.136358 19910331,0.07095,0.091682 19910630,-0.013321,0.038081 19910930,-0.0295,0.003669 19911231,-0.156549,-0.137607 19920331,0.017589,0.064988 19920630,0.007732,-0.024331 19920930,-0.23723,-0.12485 19921231,0.070453,0.134109 19930331,0.389552,0.20476 19930630,0.241707,0.129101 19930930,0.156913,0.138123 19931231,0.147197,0.159448 19940331,0.095438,0.055198 19940630,-0.055233,-0.044913 19940930,-0.030302,0.011047 19941231,0.063926,0.108581 19950331,-0.017999,-0.072098 19950630,0.163853,0.161974 19950930,0.10443,0.06881 19951231,0.011733,0.00659 19960331,0.126027,0.063493 19960630,0.071894,0.116377 19960930,0.034406,0.014356 19961231,0.176591,0.161673 19970331,0.154836,0.112683 19970630,0.061366,0.133686 19970930,0.152963,0.170103 19971231,-0.027704,-0.016319 19980331,0.047283,0.109448 19980630,-0.030442,-0.030965 19980930,-0.248347,-0.275097 19981231,-0.058633,0.082056 19990331,0.16574,0.158156 19990630,0.186756,0.130437 19990930,0.028715,0.055183 19991231,0.198017,0.361411 20000331,0.144684,0.077792 20000630,0.021181,0.072313 20000930,0.089207,0.144045 20001231,-0.113777,-0.053201 20010331,0.017418,-0.017728 20010630,0.015722,0.053103 20010930,-0.14813,-0.155184 20011231,0.104748,0.148551 20020331,0.114884,0.107865 20020630,-0.07853,-0.119333 20020930,-0.198494,-0.183044 20021231,0.036909,0.062531 20030331,-0.011063,-0.075875 20030630,0.250191,0.276433 20030930,0.109948,0.066898 20031231,0.177996,0.234307 20040331,0.140695,0.14465 20040630,0.027373,0.06327 20040930,0.067955,0.096218 20041231,0.138254,0.075617 20050331,0.129841,0.112624 20050630,0.107864,0.146968 20050930,0.177497,0.190462 20051231,0.059285,0.025436 20060331,0.155829,0.21261 20060630,-0.027428,-0.040128 20060930,0.026616,0.00817 20061231,0.131751,0.191294 20070331,0.05283,0.048273 20070630,0.084119,0.142124 20070930,-0.039429,-0.007432 20071231,-0.027987,0.026452 20080331,-0.112029,-0.137751 20080630,0.032891,0.136495 20080930,-0.168781,-0.242723 20081231,-0.221061,-0.227163 20090331,-0.020734,0.014988 20090630,0.293505,0.262288 20090930,0.124287,0.169734 20091231,0.094545,0.14464 20100331,0.088699,0.034019 20100630,-0.077254,-0.090118 20100930,0.072646,0.155685 20101231,0.158041,0.170093 20110331,0.058283,0.034655 20110630,-0.042535,-0.032974 20110930,-0.127099,-0.131296 20111231,0.026544,0.122486 20120331,0.120205,0.110222 20120630,-0.027727,-0.037436 20120930,0.035716,0.093611 20121231,0.032039,0.004237 20130331,0.115462,0.076604 20130630,0.026963,0.009831 20130930,0.075271,0.081197 20131231,0.081335,0.095876 20140331,0.044084,0.030813 20140630,0.052523,0.106967 20140930,-0.010089,0.006865 20141231,-0.042019,-0.008381 20150331,0.059984,0.090616 20150630,0.053543,0.025767 20150930,-0.014054,-0.032976 20151231,0.066697,0.072022 20160331,0.016386,-0.037843 20160630,0.036709,0.065455 20160930,0.079093,0.042317 20161231,0.131293,0.135362 20170331,0.037819,0.019974 20170630,0.031972,0.031061 20170930,0.065512,0.133147 20171231,0.028932,0.056852 20180331,-0.003707,0.006529 20180630,0.092775,0.12233 20180930,0.038699,0.073175 20181231,-0.131393,-0.123939 20190331,0.094917,0.099356 20190630,0.022702,0.016201 20190930,0.022961,0.030264 20191231,0.115881,0.060063 20200331,-0.217178,-0.191756 20200630,0.217837,0.13161