public function __construct() {
		global $wpdb;

		$current_db_version = $this->get_installed_version();

		if ( ! $current_db_version || $current_db_version < $this->version ) {
			// Install the table.
			@$this->create_table();

			if ( $wpdb->get_var( "SHOW TABLES LIKE '{$this->table_name()}'" ) == $this->table_name() ) {
				$this->update_db_version();
			}
		}

		$wpdb->{$this->table_name} = $this->table_name();
	}