History of DSMR integration

Hey guys, my DSMR integration which i have been using for approximately one year stopped keeping track of my energy consumption a while ago.
After trying to fix it i ended up deleting the integration and making a new one, i use the default “DSMR slimme meter” to keep track of the consumption.
Now i have lost the data of the last year, so i was wondering if could retrieve it from a old HA full backup and import it to the new DSMR integration.
I have looked in the files / storage etc. but couldn’t find anything that looks like a energy consumption history.
Thanks for you help in advance.