In 1920 it curved upward from 10 to about 20 per cent. During the next three years it gradually dipped to 10 per cent again, reaching its low point in 1923. In 1924, however, it rose once more to between 15 and 20 per cent, in 1925 to more than 20 per cent; and the curve continued steadily upward until by 1927 it had passed the 25 per cent mark—in other words, until the skirt had reached the knee. There it remained until late in 1929.
