No, the surplus skews it. If there's 120 males and 100 females for an age bracket like 30 - 40, and 80 of them are couples (assuming hetero), that leaves 40 males for 20 females as the rest, 2:1 single ratio. Men are born like 1.05 : 1 so early years are male-surplus and elderly are female-surplus because men die quicker. Then you also have the conundrum where males 20 - 50 are competing for women 20 - 35, so market dynamics aren't always 1 to 1 age-wise.