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 | Nation | Gold | Silver | Bronze | Total |
| --- | --- | --- | --- | --- | --- |
| 1 | United States (USA) | 25 | 16 | 7 | 48 |
| 2 | Canada (CAN) | 5 | 4 | 7 | 16 |
| 3 | Jamaica (JAM) | 4 | 3 | 4 | 11 |
| 4 | Cuba (CUB) | 3 | 8 | 4 | 15 |
| 5 | Mexico (MEX) | 0 | 3 | 3 | 6 |
| 6 | Brazil (BRA) | 0 | 2 | 1 | 3 |
| 7 | Puerto Rico (PUR) | 0 | 1 | 1 | 2 |
| 8 | Colombia (COL) | 0 | 0 | 3 | 3 |
| 9 | Peru (PER) | 0 | 0 | 2 | 2 |
| 9 | Trinidad and Tobago (TRI) | 0 | 0 | 2 | 2 |
| 11 | Chile (CHI) | 0 | 0 | 1 | 1 |
| 11 | Uruguay (URU) | 0 | 0 | 1 | 1 |
| 11 | Venezuela (VEN) | 0 | 0 | 1 | 1 |
Question:
what country is the only country with at least 20 gold medals?
Answer:
United States (USA)