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: Jan '20 5.31 GiB / 9.36 GiB / 14.67 GiB Feb '20 2.97 GiB / 6.33 GiB / 9.31 GiB / 11.26 GiB yesterday 160.09 MiB / 704.95 MiB / 865.04 MiB today 50.50 MiB / 193.21 MiB / 243.71 MiB / 253 MiB