677      * @param int  $year1
682     public function statsBirthQuery(int $year1 = -1, int $year2 = -1): Builder  argument
691         if ($year1 >= 0 && $year2 >= 0) {
692             $query->whereBetween('d_year', [$year1, $year2]);
701      * @param int  $year1
706     public function statsBirthBySexQuery(int $year1 = -1, int $year2 = -1): Builder  argument
708         return $this->statsBirthQuery($year1, $year2)
735      * @param int  $year1
740     public function statsDeathQuery(int $year1 = -1, int $year2 = -1): Builder  argument
749         if ($year1 >= 0 && $year2 >= 0) {
750             $query->whereBetween('d_year', [$year1, $year2]);
759      * @param int  $year1
764     public function statsDeathBySexQuery(int $year1 = -1, int $year2 = -1): Builder  argument
766         return $this->statsDeathQuery($year1, $year2)
795      * @param int    $year1
800 …public function statsAgeQuery(string $related = 'BIRT', string $sex = 'BOTH', int $year1 = -1, int…  argument
804         if ($year1 >= 0 && $year2 >= 0) {
810                 $query->whereBetween('birth.d_year', [$year1, $year2]);
812                 $query->whereBetween('death.d_year', [$year1, $year2]);