protected function do_chart_age() {

		$allage = $this->get_all_age();
		$age    = $this->get_age_count( $allage );

		$array = array( array( 'Age', 'Amount' ) );
		foreach ( $age as $value ) {
			array_push( $array, array( 'Age ' . $value[1], $value[2] ) );
		}

		return wp_send_json( $array );
	}