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