Over the past two months, Lisa has received several orders for goat grazing services. The order date, promise date, and delivery dates are shown in the table below.

Order Date	Promise Date	Delivery Date
June 1	June 2	June 3
June 1	June 4	June 4
June 6	June 7	June 7
June 13	June 15	June 15
June 15	June 16	June 18
June 15	June 18	June 20
June 18	June 22	June 22
June 19	June 25	June 25
June 20	June 27	June 27
June 22	June 29	June 29
June 24	June 28	June 30
June 26	July 4	July 4
June 28	July 8	July 7
June 30	July 8	July 9

What is Lisa's percentage of on-time deliveries?