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 wlan0: Not enough data available yet. eth0: Dec '19 2.18 GiB / 6.95 GiB / 9.13 GiB Jan '20 3.92 GiB / 7.26 GiB / 11.18 GiB / 14.63 GiB yesterday 169.29 MiB / 284.06 MiB / 453.35 MiB today 131.06 MiB / 164.88 MiB / 295.93 MiB / 426 MiB