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: Mar '20 45.33 GiB / 67.17 GiB / 112.51 GiB Apr '20 652.89 MiB / 10.06 GiB / 10.70 GiB / 43.56 GiB yesterday 65.18 MiB / 1.16 GiB / 1.23 GiB today 19.94 MiB / 194.69 MiB / 214.62 MiB / 579 MiB