A computer implemented data processing system and method processes data relating to a deferred annuity contract during the accumulation phase for a relevant life. The system is configured to determine an amount of an available benefit payment, available on a periodic basis for withdrawal without reduction...http://www.google.de/patents/US8103573?utm_source=gb-gplus-sharePatent US8103573 - Method and system for processing data for a deferred annuity with available benefit payments related to an increasing withdrawal percent