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 | Name | Headquarters | Primary industry | Market value ( USD million) |
| --- | --- | --- | --- | --- |
| 1.0 | Exxon Mobil | United States | Oil and gas | 446943.0 |
| 2.0 | General Electric | United States | Conglomerate | 383564.0 |
| 3.0 | Microsoft | United States | Software industry | 293537.0 |
| 4.0 | Citigroup | United States | Banking | 273691.0 |
| 5.0 | Gazprom | Russia | Oil and gas | 271482.0 |
| 6.0 | Industrial and Commercial Bank of China | China | Banking | 254592.0 |
| 7.0 | Toyota Motor Corporation | Japan | Automotive | 241161.0 |
| 8.0 | Bank of America | United States | Banking | 239758.0 |
| 9.0 | Royal Dutch Shell | The Netherlands | Oil and gas | 225781.0 |
| 10.0 | BP | United Kingdom | Oil and gas | 218643.0 |
Question:
Where is Exxon Mobil, an oil and gas corporation, headquartered?
Answer:
United States