11. School drop-out rates and grade repetition rates are high. 12. In addition, dropout and repetition rates , although moderate by Latin American standards, were still considered high. 13. The pulse repetition rate can range from one per minute to tens of thousands per minute. 14. A click train with a repetition rate over 600 per second is called a burst pulse. 15. In the tests, repetition rate of 50 Hz was used, with pulse width between 10-70 microseconds. 16. The calls of these species are similar although differ in frequency, length, note and repetition rate . 17. The correct endpoint behavior is usually to repeat dropped information, but progressively slow the repetition rate . 18. These conditions are obtained by reactor, a repetition rate of several per second will be needed. 19. In parallel, the HiPER project also proposes to build smaller laser systems with higher repetition rates . 20. They do not offer continuous readout, although repetition rates as high as twenty hertz can be achieved.