    this.addEventListener('iron-resize', this._setChartSize)
      }

      _setChartSize() {
        this.width = this.$.chartContainer.offsetWidth
        this.height = this.$.chartContainer.offsetHeight
        if (this.width > 0) {
          this.columnOptions = {
            width: this.width,
            height: 500,
            vAxis: {
              "minValue": 0,
              "maxValue": 10
            },
            tooltip: {
              isHtml: true
            },
            legend: {
      