lo0 counters not collected on darwin

regex fails to match on lo0 counters because there is no mac address.

netstat -i -d -l -b -n -W
Name Mtu Network Address Ipkts Ierrs Ibytes Opkts Oerrs Obytes Coll Drop
lo0 16384 <Link#1> 26084 0 2347105 26072 0 2347105 0
lo0 16384 fe80::1%lo0 fe80:1::1 26084 - 2347105 26072 - 2347105 - -
lo0 16384 127 127.0.0.1 26084 - 2347105 26072 - 2347105 - -
lo0 16384 ::1/128 ::1 26084 - 2347105 26072 - 2347105 - -
gif0* 1280 <Link#2> 0 0 0 0 0 0 0
stf0* 1280 <Link#3> 0 0 0 0 0 0 0
en0 1500 <Link#4> 00:23:32:b9:77:b2 0 0 0 0 0 342 0
en1 1500 <Link#5> 00:23:12:55:57:5e 13543346 0 19506677329 5804191 0 676245979 0
en1 1500 fe80::223:1 fe80:5::223:12ff: 13543346 - 19506677329 5804191 - 676245979 - -
en1 1500 192.168.0 192.168.0.95 13543346 - 19506677329 5804191 - 676245979 - -
fw0 4078 <Link#6> 00:23:32:ff:fe:b9:77:b2 0 0 0 0 0 346 0
vmnet 1500 <Link#7> 00:50:56:c0:00:08 0 0 0 0 0 0 0
vmnet 1500 192.168.78 192.168.78.1 0 - 0 0 - 0 - -
vmnet 1500 <Link#8> 00:50:56:c0:00:01 0 0 0 0 0 0 0
vmnet 1500 192.168.184 192.168.184.1 0 - 0 0 - 0 - -