Brain Puzzler #2

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You're driving a bus that is leaving on a trip from Pennsylvania and ending in New York. To start off with, there were 32 passengers on the bus. At the next bus stop, 11 people get off and 9 people get on. At the next bus stop, 2 people get off and 2 people get on. At the next bus stop, 12 people get on and 16 people get off. At the next bus stop, 5 people get on and 3 people get off. What color are the bus driver's eyes?