Okay, it works a little bit different, people get older and older, so type for current data
australia age distribution 2020
to wolfram alpha, click detail and sum again
In[2]:= Plus @@ {1121000, 768904, 524011, 325222, 155069, 42247, 46708}
Out[2]= 2983161
more than a factor of 4 after fifty years.
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