user: ### NOW ANSWER:
Question: What is the lowest overall amount of rainfall totals (million m 3)?
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 )']
Types: ['text', 'real', 'real', 'real', 'real', 'real']
Sample row: ['Blue Mountains, South', 678.0, 1694.0, 912.0, 662.0, 147.0]
SQL:

assistant: SELECT MIN("Rainfall totals (million m 3 )") FROM "Table";