Current Year vs Previous Year

[kmax]

Hi,
I am working on a report that finds average resolution time. 
I can find the average resolution time of current year using the following measure.

Average Days to Resolve CY =

VAR TotalResolutionTime2023 =

    CALCULATE(

        [Total Resolution Time],

        FILTER(

            'Issues',

            'Issues'[YearResolved] = 2023

        )

    )

VAR TotalTickets2023 =

    CALCULATE(

        [TotalTickets],

        FILTER(

            'Issues',

            'Issues'[YearResolved] = 2023

        )

    )

RETURN

    DIVIDE(

        TotalResolutionTime2023,

        TotalTickets2023,

        0

    )

I have created similar measures for years 2022 and 2021. 

I have a year slicer [2020, 2021, 2022, 2023]
All the columns are in a single table. I have created new columns for month, and year from the date column in the same table.
What I want is if 2023 is selected from the slicer, the data in the line chart or bar chart should show values of the Current year (selected) and the previous year. In the case of the bar chart, two bars (one for 2023 and the second for 2022). Similarly if 2022 is selected from the slicer, it should show data for 2022 and 2021.
I tried using year(lastyear) -1 but it is not working. 
I have attached the screenshot of how it is showing for now.
Any idea, how can I achieve it?

Thanks in advance

[lbendlin]

Add a calendar table to your data model.  Use standard time intelligence functions like SAMEPERIODLASTYEAR or DATEADD.

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