在Google Sankey Chart上显示下线

Question

我想使用Google Sankey Chart来显示有多少玩家参加了测验，完成了测试，并赢得或失去了测验。我有以下代码：

     google.charts.load('current', {'packages':['corechart','sankey']});
        google.charts.setOnLoadCallback(drawChart);
        //console.log(gameAssets);
        
        function drawChart() { 
                    var sankeydata = new google.visualization.DataTable();
                    sankeydata.addColumn('string', 'From');
                    sankeydata.addColumn('string', 'To');
                    sankeydata.addColumn('number', "Number of Players");
                    sankeydata.addRows([
                      [ "Number of Players","Completions", 391 ],
                      ["Completions","Successful Completions",160],
                      ["Number of Players","Exit" ,768],
                      ["Completions","Unsuccessful Completions",231]
                    ]);
        
                    // Sets chart options.
                    var options = {
                      width: 970,
                      sankey: {
                        node: {
                          width: 4 ,
                          colors: ['#883b90'],
                          label: { 
                             fontSize: 14
                               
                          }
                        },
                        link: {
                          color: { fill: '#f4eee2' }
                        }
                      }
                    };
                    var sankey_chart = new google.visualization.Sankey(document.getElementById('sankey_basic'));
                    sankey_chart.draw(sankeydata, options)
    }
        
               
    <script src="https://www.gstatic.com/charts/loader.js"></script>
    <div id="sankey_basic" style="width: 900px; height: 300px;"></div>

我遇到的问题是没有完成测验的球员（显示为＆＃34;退出＆＃34;在Sankey图表上）位于最后一栏（与成功完成相同的栏目）不成功完成）。我宁愿把它与完成程度放在同一水平上。 即使是更好的选择，也可以像google Analytics一样显示下降，红色箭头指向下方，如下所示：

是否可以使用Google Charts？