claim: And from 1940 to today, flood damage as a percentage of GDP has fallen to less than 0.05 per cent per year from about 0.2 per cent.
evidence: Data collected by the Commonwealth Scientific and Industrial Research Organisation (CSIRO) in Australia show the current global mean sea level trend to be 3.2 mm (0.13 in) per year, a doubling of the rate during the 20th century.