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:
| Pos | Country: | Gold: | Silver: | Bronze: | Total: |
| --- | --- | --- | --- | --- | --- |
| 1 | Italy (ITA) | 3 | 3 | 1 | 7 |
| 2 | United States (USA) | 3 | 0 | 1 | 4 |
| 3 | Poland (POL) | 1 | 3 | 3 | 7 |
| 4 | Soviet Union (URS) | 1 | 2 | 2 | 5 |
| 5 | Hungary (HUN) | 1 | 0 | 0 | 1 |
| 5 | Czechoslovakia (TCH) | 1 | 0 | 1 | 2 |
| 7 | Ghana (GHA) | 0 | 1 | 0 | 1 |
| 7 | South Africa (RSA) | 0 | 1 | 1 | 2 |
| 9 | Great Britain (GBR) | 0 | 0 | 3 | 3 |
| 10 | Australia (AUS) | 0 | 0 | 2 | 2 |
| 11 | Japan (JPN) | 0 | 0 | 1 | 1 |
| 11 | United Arab Republic (EGY) | 0 | 0 | 1 | 1 |
| 11 | Finland (FIN) | 0 | 0 | 1 | 1 |
| 11 | Argentina (ARG) | 0 | 0 | 1 | 1 |
| 11 | Romania (ROU) | 0 | 0 | 1 | 1 |
| 11 | Germany (EUA) | 0 | 0 | 1 | 1 |
Question:
how many more silvers did italy win compared to the united states?
Answer:
3