State Pension Summary - Clarification of Estimate

I have just checked my State Pension estimate and am a little confused about the result. My current estimate indicates I have qualified for a £221.19 pension and if I pay another year's contributions I will receive £221.20, the maximum amount. If I check my contribution record I can count 34 years contributions. Can someone explain why 34 years would give me £221.19? I thought each year of contributions was worth £6.33. Why would I contribute another year for an extra £0.01 a week?

Hi,
You will need to contact our National Insurance team and they will be able to check your National Insurance account and help you further.
National Insurance: general enquiries
Thank you.