Why do some of the figures on this Web site differ from those provided in the State of the World¿s Forests 2003?
Whereas the area figures for 1980, 1990 and 2000 and the area changes over time in the tables on this Web site are identical to those presented in the State of the World¿s Forest (SOFO) 2003, the figures for the average annual change in percentage differ for some countries. In SOFO 2003, the annual changes in mangrove areas for the two decades 1980-1990 and 1990-2000 were presented as the average annual change in percentage of the 1980 and 1990 mangrove area respectively [(Area2000/Area1990 -1)*100/10]. To facilitate comparison with the relative changes in overall forest cover in individual countries – as reported for example in the Global Forest Resources Assessment 2000 – the compound rate of change for each decade [((Area 2000/Area 1990)^0.1-1)*100] has been employed for the tables on this Web site, resulting in slightly higher relative figures for some countries. Both the absolute and the relative change figures are averages for the decade and do not capture variations in these rat
