How to calculate interest rate for pruflexicash (25year term)? Paying $150 a month. My cash benefit option is selected as accumulation but I did some withdrawal a few years back for my holidays.?

Revised benefit illustration as follows:

1st First Row
end of policy year/age : 8/28
basic premiums paid: 14,366
Gross Surrender Value (guaranteed) : 7,991
Gross Surrender Value (non-guaranteed) : 432
Total: 8,423

Last Row
end of policy year/age : 25/45
basic premiums paid: 44,895
Gross Surrender Value (guaranteed) : 26,765
Gross Surrender Value (non-guaranteed) : 36,704
Total: 63,469

The total interest I'm predicted to be getting is 41.37%.
Need help calculating other key interest rates.