Decades | Average rainfall (mm) | Temperature (˚C) | PET Average (mm) | ETa Average (mm) | Effective rainfall (mm) | Balance sheet deficit (mm) |
1969-1978 | 1941 | 26.1 | 1575 | 1280 | 661 | 295 |
1979-1988 | 1706 | 26.1 | 1548 | 1216 | 490 | 332 |
1989-1998 | 1692 | 26.2 | 1598 | 1243 | 449 | 355 |
1999-2008 | 1739 | 26.3 | 1583 | 1303 | 436 | 280 |
2009-2018 | 1825 | 26.9 | 1618 | 1430 | 395 | 188 |