At Rainbow Hospital there is some concern about the high turn over of nurses. A survey was done to determine how long (in months) nurses had been in their current positions. The responses of 20 nurses are as follows:

23, 2, 5, 14, 25, 36, 27, 42, 12, 8, 7, 23, 29, 26, 28, 11, 20, 31, 8, 36

Find the maximum value.