Congruence of Two booms (Population Age Distribution, China) 25 0369121518212427303336394245485154576063666972757881848790 Age 2000 2050 (Mason and Wang 2007)Congruence of Two Booms (Population Age Distribution, China) 0 5 10 15 20 25 30 0 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 78 81 84 87 90 Population (millions) Age 1982 2000 2050 (Mason and Wang 2007)