public function totalMarriedMales(): string
    {
        $n = (int) DB::table('families')
            ->where('f_file', '=', $this->tree->id())
            ->where('f_gedcom', 'LIKE', "%\n1 MARR%")
            ->distinct()
            ->count('f_husb');

        return I18N::number($n);
    }