singles females and marriage

i was watching a documentary in Korean
they interviewed a single women with her own book store
she was in 30s yet single
she said she does want to get married but now does not seem to be a great time for marriage

studies conducted showed that there are more single women in 30s today
studies in 1970 showed that only 9.1% of female population between ages of 20-30 were single
today 58% were single
the results above are for South Korea not the world

another study showed that Japan was passed the 50% mark 20 yrs before Korea
survey shows that more women believe one does not need to marry to live a happy life
korea (51% of women between 20-30 said marriage was not necessary)
Japan (59% of women between 20-30 said marriage was not necessary)
the theory is economy
Japan is very well known for strong economy so the theory behind the numbers might be economy
women wants to be more independent and strong economy is allowing these women to open businesses and financially independent

i just thought this was interesting
now i wonder what men's numbers are and how men feel about this