rx      /      tx      /     total    /   estimated
 eth0:
       Jul '15     11.07 GiB  /   13.21 GiB  /   24.28 GiB
       Aug '15      1.46 GiB  /    2.03 GiB  /    3.48 GiB  /    6.65 GiB
     yesterday     46.00 MiB  /   37.10 MiB  /   83.10 MiB
         today      9.36 MiB  /    7.85 MiB  /   17.21 MiB  /      73 MiB

 eth1: Not enough data available yet.