The link which I have shared below helps you calculate the dividends you have received during a period for liquid bees.
https://www.reliancemutual.com/FundsAndPerformance/Pages/IDC.aspx
Let us take an example. Assume that I have 1000 units of liquid bees in your account. If I select the time interval as shown in the screenshot then I would receive 38.600 as dividend units which means I made approx 3.86 % in returns for that year.