I have green eyes but they're changing color in different lighting.
Green eyes are 'produced' when one of parents(or ancestors) got brown eyes and the other one got blue eyes, so in places where people of southern and northern regions have met(or have stolen some women from) green eyes are more common.
About 1-2% of the total population of the world have green eyes.
Turkey is a country with the highest percentage of green-eyed people - around 20% because they're quite much genetically mixed.
Apparently it's the least common eye color. Only 1-2% of the world's population have green eyes. Consider yourself lucky. If you go to places like Norther/Southern Europe, Iceland, Sweden, they're more common there. Hazel and other colors have green hues to them, so including them, about 12% of the population has green eyes/green hues.