678      * @param int  $year2
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]);
702      * @param int  $year2
706     public function statsBirthBySexQuery(int $year1 = -1, int $year2 = -1): Builder  argument
708         return $this->statsBirthQuery($year1, $year2)
736      * @param int  $year2
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]);
760      * @param int  $year2
764     public function statsDeathBySexQuery(int $year1 = -1, int $year2 = -1): Builder  argument
766         return $this->statsDeathQuery($year1, $year2)
796      * @param int    $year2
800 …tsAgeQuery(string $related = 'BIRT', string $sex = 'BOTH', int $year1 = -1, int $year2 = -1): array  argument
804         if ($year1 >= 0 && $year2 >= 0) {
810                 $query->whereBetween('birth.d_year', [$year1, $year2]);
812                 $query->whereBetween('death.d_year', [$year1, $year2]);