In 2020, the number of visitors entering Turkey was 15,963,997. The number of foreign visitors entering the country decreased by 71.74%, reaching 12,734,213, while the number of citizens residing abroad decreased by 51.71%, reaching 3,229,784. The total average loss experienced in 2020 reached 69.15%. You can see the distribution by country, border/entry points, and distribution by month in the images.
(Source: Ministry of Tourism, Republic of Turkey)