That’s not a useful statistic because above 15 includes all people above 15 and as yehudayona pointed out, women live much longer which skews the ratio.
There are more men than women at birth, so looking at the numbers at birth is just as useless.
If you want a useful statistic, look at the male:female ratio at childbearing age – let’s say 15-50 years. Nearly all people who start families, marry within these years.
Even better, look at the dating ages of 20-35.