Women don't age in normal human years. We age quicker. According to the desi world:
15-19 perfect age 20-23 good age 24-27 we're actually 30 28-30 we're actually in our 40's now
I don't know anyone who married at 15-19, it's pretty unheard of amongst the ppl we know and tbh they'd prob think the girl had gotten pregnant or had some sort of problem if she married before she finished studying or started work.. Generally the girls around us get married between 23 and 30.. Late twenties is pretty common nowadays.. Even 'back home' most of my female cousins and family get married in their mid-twenties, my Mum was the youngest to marry (at 21) and that was 30+ yrs ago (she says now she wishes she'd waited a couple of yrs)..