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The population structure of many developed countries is changing. Birth rates are low, those over 65 are living longer and the working population (16-65 years) is a smaller proportion of the total population. 

What is the most likely consequence of this changing structure? 

1 ) 

Economic migrants make up shortages in the working population. 

2 ) 

Overall the standard of living is gradually falling. 

3 ) 

The population is healthier and needs less medical care.

4 ) 

The ratio of those under 16 dependent on the working population is rising.

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