nathang,
It is a good job they don't!!
160 times 7% would be 1,120% !!!
That is the reason why EB3-ROW are stuck. They have the demand, but after China, India, Mexico and Philippines have used their share, only about 24k are left before reaching the 40k limit set for EB3 overall.
That leaves most ROW Countries receiving less than 1% despite having considerably more demand.