I joined in government with old system on 23/08/1983 in CSD and transferred to USD with new system on 04/1994. Then I transferred to SWD on 04/1995. Now I was at Max salary with point 17. Please teach me to calculate my pension if I retire on 23/08/2007, 50 years old(27 years less 4 months), 55 years(37 years less 4 months and 23./08/2016.