How many farmers plant GMOs worldwide?

In 2014, 18 million farmers in 28 countries planted more than 181 million hectares, up from 175 million in 27 countries in 2013. These are more farmers than all EU farmers (ca. 12 million), and they grow GMOs on an area much larger than the entire EU arable land (ca. 104 million hectares). Most of these farmers are smallholders in developing countries.