Lot of people have stopped applying f1 to usa.i have heard lot of masters phd people who got visa didn't come.because they thought it's bad investment and no return on money.good old days when anybody with any major get into IT and get h1b is gone.good old days of fake assylum is gone.Those who come here in f1 intent to stay illigally after or before finishing college.only few with extremely high IQ might get chance.Now sexy in sari option might be really true.Even when you apply working visa by people like nurses retrogassion backlog is like 10 years.so in 10 yrs they are already old and no point of coming .I don't know about other countries but they must be better since they have better rule of law regarding immigration .