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:
| Date of Sterilization | Age 10-19 | Age 20-29 | Age 30-39 | Age 40-49 | Age 50-59 | Age Unknown | Total |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Jan 1929 - Jun 1935 | 87.0 | 87.0 | 42.0 | 4.0 | 2.0 | 1.0 | 223.0 |
| Jul 1935 - Jun 1940 | 380.0 | 205.0 | 112.0 | 11.0 | 1.0 | 0.0 | 709.0 |
| Jul 1940 - Jun 1950 | 727.0 | 593.0 | 249.0 | 36.0 | 0.0 | 1.0 | 1606.0 |
| Jul 1950 - Jun 1960 | 936.0 | 1201.0 | 745.0 | 93.0 | 8.0 | 0.0 | 2983.0 |
| Jul 1960 - Dec 1968 | 686.0 | 717.0 | 260.0 | 23.0 | 1.0 | 0.0 | 1687.0 |
| Jan 1969 - Dec 1974 | 174.0 | 118.0 | 26.0 | 2.0 | 0.0 | 0.0 | 320.0 |
Question:
Name the least age 30-39 where age 20-29 is 593
Answer:
249.0