angular-ui-bootstrap uib-rating 星星评分，怎么统计多个题目的总分

Question

根据uib文档 rating 实现简单的星星评分，页面上有多个rating的时候怎么统计总分呢？？

html部分：

 <table class="table table-striped table-bordered table-hover table-style">
                    <tr class="s-table-head">
                        <td class="modal-common-head">{{data1.module}}</td>
                        <td>得分</td>
                        <td><b>总分:{{}}/25</b></td>
                    </tr>
                    <tr ng-repeat="item in data1.options" class="s-table-body">
                        <td class="question">{{item.option}}</td>
                        <td>
                          <span uib-rating ng-model="rate" max="max" on-hover="hoveringOver(value)" on-leave="overStar = null" titles="['1分','2分','3分','4分','5分']" aria-labelledby="default-rating" ></span>
                        </td>
                        <td>{{rate}}</td>
                    </tr>
                </table>

js部分：

  $scope.rate = 0;
  $scope.max = 5;

   $scope.hoveringOver = function(value) {
         $scope.overStar = value;
         };
          $scope.data1 = {
                        module: "一般礼仪方面",
                        options: [{
                            option: "问题1",
                            score: ""
                        }, {
                            option: "问题2",
                            score: ""
                        }, {
                            option: "问题3",
                            score: ""
                        }, {
                            option: "问题4",
                            score: ""
                        }, {
                            option: "问题5",
                            score: ""
                        }]
                    };

附图：uib-rating参数说明