The number of registered foreigners from Bangladesh increases by 10% every 2 years and that of unregistered foreigners from Bangladesh decreases by 10% every 2 years. If the total population of Afghanistan remain the same for all years and the number of foreigners from Bangladesh are 2% of the total population in 2012, then how many unregistered Bangladeshi were present in 2006. [In 2006, there were no foreigners in Afghanistan from any country except Bangladesh]