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:
| Year | Typhus | Typhoid fever | Relapsing fever | Smallpox | Malaria |
| --- | --- | --- | --- | --- | --- |
| 1913 | 120.0 | 424.0 | 30.0 | 67.0 | 3600 |
| 1918–22 | 1300.0 | 293.0 | 639.0 | 106.0 | 2940 (avg) |
| 1929 | 40.0 | 170.0 | 6.0 | 8.0 | 3000 |
| 1930 | 60.0 | 190.0 | 5.0 | 10.0 | 2700 |
| 1931 | 80.0 | 260.0 | 4.0 | 30.0 | 3200 |
| 1932 | 220.0 | 300.0 | 12.0 | 80.0 | 4500 |
| 1933 | 800.0 | 210.0 | 12.0 | 38.0 | 6500 |
| 1934 | 410.0 | 200.0 | 10.0 | 16.0 | 9477 |
| 1935 | 120.0 | 140.0 | 6.0 | 4.0 | 9924 |
Question:
what is the number of smallpox when typhoid fever is 293
Answer:
106.0