The bird population on an island is declining at a rate of 2.2% per year. if the population was 3500 in the year 2009, which is the best prediction of the population in the year 2014

In the year 2009 there were 3500 birds on an island. If the bird population is declining 2.2% per year it means that in the year 2014 we will have 3500*= 3131.57 birds. 
The best prediction is that in the year 2014 the bird population will be 3132.