VnStati Network Statistics
I made this page using vnStat and vnStati. It has been monitoring traffic since 7th March 2015
The graphs are updated by Cron once an hour.
I have made a how to here, if you would like to try this yourself.
Traffic statistics on a hourly basis for the last 24 hours
Traffic statistics on a daily basis for the last 30 days
Traffic statistics on a monthly basis for the last 12 months
All time top 10 traffic days
And this is the live output from vnstat:
rx / tx / total / estimated eth0: Oct '17 2.04 GiB / 5.56 GiB / 7.61 GiB Nov '17 1.42 GiB / 3.24 GiB / 4.66 GiB / 7.98 GiB yesterday 88.86 MiB / 475.56 MiB / 564.42 MiB today 48.45 MiB / 324.11 MiB / 372.55 MiB / 756 MiB wlan0: Not enough data available yet.