If you write to a hash via %hash = ($key => $value);, it'll overwrite the contents of the hash every time. If instead you want to add data to a hash, you need to write $hash{$key} = $value;. Since your output is a hash containing more hashes, this should be very helpful to you: hashes of hashes. By the way, your last line is better written print Dumper(\%slothash);, you'll see the data structure more clearly.