How can I compare this year's energy use diagram with last year's?

How can I compare this year’s energy use diagram with last year’s?

How can I compare this year's energy use diagram with last year's?

Unfortunately you are unable to do this on Bulb at present. Also the energy usage graphs or diagrams are in £’s which isn’t really of much use if you wish to compare actual energy use in kWh.

Possibly not of much help to you, I retain my own spreadsheet so I know my usage over say the last 5 years and can easily carry out any comparisons?