The following dot plot shows the daily high temperature in Kats, Colorado in April. Each dot represents a different day. A dot plot has a horizontal axis labeled, Temperature, in degrees Celsius, marked from 0 to 20, in increments of 1. The number of dots above each temperature value is as follows. 6, 1; 7, 2; 8, 2; 9, 3; 10, 5; 11, 3; 12, 4; 13, 1; 14, 2; 16, 2; 17, 2; 18, 2; 19, 1.

A dot plot has a horizontal axis labeled, Temperature, in degrees Celsius, marked from 0 to 20, in increments of 1. The number of dots above each temperature value is as follows. 6, 1; 7, 2; 8, 2; 9, 3; 10, 5; 11, 3; 12, 4; 13, 1; 14, 2; 16, 2; 17, 2; 18, 2; 19, 1.
What was the greatest high temperature?