public function chartChildren(): string
    {
        $data = [
            [
                I18N::translate('Century'),
                I18N::translate('Average number')
            ]
        ];

        foreach ($this->queryRecords() as $record) {
            $data[] = [
                $this->century_service->centuryName((int) $record->century),
                (float) $record->num
            ];
        }

        $chart_title   = I18N::translate('Average number of children per family');
        $chart_options = [
            'title' => $chart_title,
            'subtitle' => '',
            'legend' => [
                'position'  => 'none',
            ],
            'vAxis' => [
                'title' => I18N::translate('Number of children'),
            ],
            'hAxis' => [
                'title' => I18N::translate('Century'),
            ],
            'colors' => [
                '#84beff'
            ],
        ];

        return view(
            'statistics/other/charts/column',
            [
                'data'          => $data,
                'chart_options' => $chart_options,
                'chart_title'   => $chart_title,
            ]
        );
    }