You are the manager of a grocery store. Lately, customers have been complaining about the eggs they purchase being bad. You know your fridges work properly, so you suspect it is the supplier's fault. When the next egg shipment comes in, you grab an empty carton and randomly select 12 eggs from the shipment. You crack them open and find 9 good eggs and 3 bad eggs. With a 95% confidence level, what percentage of the eggs are good in this shipment?