google.load('visualization', '1.0', {'packages':['corechart']});
google.setOnLoadCallback(function(){
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       data.addColumn('number', 'DL数');
       data.addColumn('number', 'Googleセルラン');
       data.addColumn('number', 'iOSセルラン');
       data.addColumn({type:'string', role:'annotation'});
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['2020-03-29',185674,null,293,null,null],
['2020-03-30',185715,null,418,null,null],
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['2020-04-19',188982,null,640,null,null],
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['2020-05-20',193753,null,156,null,null],
['2020-05-21',193911,null,229,null,null]
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    vAxes:[
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    series: {
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    tooltip: { trigger: 'both' },
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});