public function chartSex(
        int $tot_m,
        int $tot_f,
        int $tot_u,
        string $color_female = null,
        string $color_male = null,
        string $color_unknown = null
    ): string {
        $color_female  = $color_female  ?? '#ffd1dc';
        $color_male    = $color_male    ?? '#84beff';
        $color_unknown = $color_unknown ?? '#777777';

        $data = [
            [
                I18N::translate('Type'),
                I18N::translate('Total')
            ],
        ];

        if ($tot_m || $tot_f || $tot_u) {
            $data[] = [
                I18N::translate('Males'),
                $tot_m
            ];

            $data[] = [
                I18N::translate('Females'),
                $tot_f
            ];

            $data[] = [
                I18N::translate('Unknown'),
                $tot_u
            ];
        }

        return view(
            'statistics/other/charts/pie',
            [
                'title'            => null,
                'data'             => $data,
                'colors'           => [$color_male, $color_female, $color_unknown],
                'labeledValueText' => 'percentage',
            ]
        );
    }