How many countries in the world have a 30% or more parliamentary seat reservation for women?

The largest democracy in the world, India, has just made a partial success in a far-reaching democratic experimentation by getting a constitutional amendment ped in its upper house of the parliament. This amendment when fully implemented would make one-third of the parliament seats reserved for women. How many democracies in the world have attempted this kind of a women reservation policy in the past? Would it be of any good for the country ?