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 | Russia | 3 | 0 | 2 | 5 |
| 2 | Italy | 1 | 1 | 0 | 2 |
| 3 | Finland | 0 | 1 | 0 | 1 |
| 3 | Germany | 0 | 1 | 0 | 1 |
| 3 | Switzerland | 0 | 1 | 0 | 1 |
| 6 | France | 0 | 0 | 1 | 1 |
| 6 | Georgia | 0 | 0 | 1 | 1 |
|  | Total | 4 | 4 | 4 | 12 |
Question:
what is the difference between the number of medals earned by the highest-earning country and the lowest-earning country?
Answer:
4