ID               Date
13               10102005
13               09152005
13               11052005
200              11012005
200              11152004

Here's the code I wrote:
foreach $data1(@data_241) {
	@compare1 = split($data1);
	foreach $data2(@data_241) {
		@compare2 = split($data2);
		if ($compare1[0] == $compare2[1]) {
			if ($compare1[1] > $compare2[2]) {
				print NEW "@compare1";
			}
		}
	}
}