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');
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    legend: {position: 'top' },
    vAxes:[
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    series: {
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    tooltip: { trigger: 'both' },
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    colors:['#2980b9','#e74c3c']
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  google.visualization.events.addListener(chart, 'click', function() {
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});