It would not be surprising that the growth rates would go down in time -- increasing population would put pressure on land resources needed for human habitation, food production, transportation, commerce, industry, social and civic activities. However, since land resources are finite, the lands used would come either from existing food production areas and forest lands.
The conversion of agricultural and forest lands for use in other human activities is most evident in the National Capital Region (NCR) Megalopolis area -- comprising the contiguous regions of Metro Manila (NCR), CALABARZON and Central Luzon (blue region of the pie graph in Fig. 3a) -- where more than 34 million (37.3%) of the more than 92 million Filipinos reside (as of the 2010 Philippine Census). If the National Capital Region (NCR) Megalopolis were a separate country, it would be the 35th largest country in the world in terms of population -- larger than Canada, Saudi Arabia, Australia, Netherlands, Austria, Switzerland, larger than many of the ASEAN countries, except Indonesia, Vietnam and Thailand, larger than any of the Scandinavian countries, any Central American and Caribbean countries and more.