Calculate percentage of values ​based on different dates

Question

Want to get this [1]: https://i.stack.imgur.com/8dXSG.png so i have 2018 as index period and need calculate difference in each year with 2018: example 2018 and 2019, 2018 and 2020, 2018 and 2021...

Need to use something like summarize total=sum(value) | where date == '2018-01-01' but how iterate each value to 2024 year?

Please help, checked Kusto doc but hav'nt find answer how to do that :(

i have this table

datatable(Value:int, Date:datetime) 
    [2121, datetime(2018-01-01), //100% as this is index perios
     5645, datetime(2019-01-01), // will be 266%
     5123, datetime(2020-01-01),
     4478, datetime(2024-01-01),
     9965, datetime(2024-01-01),
     7645, datetime(2024-01-01),
    ];