Dear friend, Every year a chart is being published by the Finance department for calculation of the accumulation of the savings fund. Its only for the person who retires during the stipulated period mentioned in the chart.
For example the latest chart has been published for the year of cessation of membership 2012-13. Means Nov, 2012 to October, 2013. Click the link below to view the latest publication: https://wbxpress.com/topic/table-of-group-insurance-scheme-1987-for-2012-13/
Conclusion: Your accumulation cant be calculated right now. It may be calculated after Nov, 2041.