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:
| 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 ) |
| --- | --- | --- | --- | --- | --- |
| Blue Mountains, South | 678.0 | 1694.0 | 912.0 | 662.0 | 147.0 |
| Kingston | 202.0 | 312.0 | 208.0 | 81.0 | 50.0 |
| Río Cobre | 1283.0 | 2009.0 | 1450.0 | 177.0 | 472.0 |
| Río Minho | 1700.0 | 2420.0 | 1641.0 | 225.0 | 593.0 |
| Black River | 1460.0 | 2530.0 | 1530.0 | 346.0 | 654.0 |
| Cabarita River | 924.0 | 1890.0 | 1019.0 | 366.0 | 451.0 |
| Great River | 791.0 | 1685.0 | 863.0 | 467.0 | 355.0 |
| Martha Brae, River | 756.0 | 1154.0 | 673.0 | 279.0 | 201.0 |
| Dry Harbour Mountains | 1362.0 | 2450.0 | 1302.0 | 457.0 | 691.0 |
| Blue Mountains, North | 1597.0 | 5068.0 | 2346.0 | 2452.0 | 278.0 |
Question:
What is the lowest overall amount of rainfall totals (million m 3)?
Answer:
312.0