The official in charge of keeping count of what goes on in Greece, warned yesterday that unless Greeks have more children or immigrants are assimilated, the country’s population will drop. The population is likely to shrink if the birthrate does not increase from the current average of 1.3 births for every family to 2.2 births, National Statistical Service General Secretary Manolis Kontopyrakis said in a report to the government. Kontopyrakis said he will ask the prime minister to either take steps to encourage people to have more children, or else allow immigrants complete economic and social assimilation. Otherwise, he warned, within the next few years the population will decline. According to the European Commission’s third report on economic and social cohesion, by 2015 the population will begin to decrease in Greece, Spain, Portugal and Germany.