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: Sep '19 18.31 GiB / 23.58 GiB / 41.89 GiB Oct '19 3.96 GiB / 22.69 GiB / 26.65 GiB / 40.83 GiB yesterday 187.18 MiB / 117.26 MiB / 304.43 MiB today 9.55 MiB / 11.30 MiB / 20.85 MiB / 84 MiB