Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Rank | City | Population | Country | Area (km²) |
| --- | --- | --- | --- | --- |
| 1.0 | Tokyo | 36669000.0 | Japan | 13500.0 |
| 2.0 | Shanghai | 16575000.0 | China | 3920.0 |
| 3.0 | Beijing | 12385000.0 | China | 7860.0 |
| 4.0 | Manila | 11628000.0 | Philippines | 640.0 |
| 5.0 | Osaka–Kobe | 11337000.0 | Japan | 1220.0 |
| 6.0 | Seoul | 9773000.0 | South Korea | 610.0 |
| 7.0 | Chongqing | 9401000.0 | China | 7490.0 |
| 8.0 | Jakarta ( Jabodetabek ) | 9210000.0 | Indonesia | 1360.0 |
| 9.0 | Shenzhen | 9005000.0 | China | 1950.0 |
| 10.0 | Guangzhou | 8884000.0 | China | 7260.0 |
| 11.0 | Tianjin | 7884000.0 | China | 7130.0 |
| 12.0 | Wuhan | 7681000.0 | China | 8490.0 |
| 13.0 | Hong Kong | 7069000.0 | Hong Kong | 1100.0 |
| 14.0 | Bangkok | 6976000.0 | Thailand | 1570.0 |
| 15.0 | Ho Chi Minh City | 6167000.0 | Vietnam | 2090.0 |
| 16.0 | Dongguan | 5347000.0 | China | 2460.0 |
| 17.0 | Shenyang | 5166000.0 | China | 3460.0 |
| 18.0 | Foshan | 4969000.0 | China | 3813.0 |
| 19.0 | Chengdu | 4961000.0 | China | 2130.0 |
| 20.0 | Singapore | 4837000.0 | Singapore | 690.0 |
| 21.0 | Xi'an | 4747000.0 | China | 3550.0 |
| 22.0 | Nanjing | 4591000.0 | China | 6600.0 |
| 23.0 | Yangon | 4350000.0 | Burma | 350.0 |
| 24.0 | Harbin | 4251000.0 | China | 4280.0 |
| 25.0 | Hangzhou | 3860000.0 | China | 3068.0 |
| 26.0 | Changchun | 3597000.0 | China | 3616.0 |
| 27.0 | Shantou | 3502000.0 | China | 1956.0 |
| 28.0 | Busan | 760.0 | South Korea | 760.0 |
Question:
What is Busan's rank?
Answer:
28.0