Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the lowest overall amount of rainfall totals (million m 3)?

### Inputs:
table_name: table, columns: ['Hydrographic Basin', 'Surface Area (km 2 )', 'Rainfall totals (million m 3 )', 'Evapotranspiration (million m 3 )', 'Surface water runoff (million m 3 )', 'Groundwater discharge (million m 3 )']

### Response:
SELECT MIN Rainfall totals (million m 3 ) FROM table