public static function cc_exp_years(int $length=10) {
		if ($length < 1) {
			$length = 10;
		}

		$years = array();
		for ($x = 0; $x < $length; ++$x) {
			$year = (int) (\date('Y') + $x);
			$years[$year] = $year;
		}

		return $years;
	}