KYIV (Reuters) – Ukraine has exported almost 23.6 million tonnes of grain so far in the 2022/23 season, down from the 33.5 million tonnes exported by the same stage of the previous season, agriculture ministry data showed on Monday. The volume included around 8.6 million tonnes of wheat, 13.3 million tonnes of corn and about 1.7 million tonnes of barley. After an almost six-month blockade caused by the Russian invasion, three Ukrainian Black Sea ports were unblocked at the end of July under a deal between Moscow and Kyiv brokered by the United Nations and Turkey. The government has said that U…