# demography S1 
10  10  10  10  10  
10  10  10  10  10  
10  10  10  10  10  
10  10  10  10  10  
10  10  10  10  10  
50  50  50  50  50  
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40  40  40  40  40  
40  40  40  40  40  
30  30  30  30  30  
20  20  20  20  20  

