各國人口成長率 population growth rate
The planet's population continues to explode: from 1 billion in 1820, to 2 billion in 1930, 3 billion in 1960, 4 billion in 1974, 5 billion in 1988, and 6 billion in 2000. For the 21st century, the continued exponential growth in science and technology raises both hopes (e.g., advances in medicine) and fears (e.g., development of even more lethal weapons of war).
6,706,993,152 (July 2008 est.)
台灣人口成長率(自然增加率)0.24%排名(181/232)
source: CIA, Sustainable Scale
72法則
人口年成長率在4%的國家,只需要18年就能人口翻番(rule of 72)。而人口成長率為1%的國家,需要70年才能人口翻番(rule of 70)。
聯合國估計2005-2010年平均人口成長率為1.1%。
指數函數(f(x)=a^x)、指數成長、幾何級數、等比級數、等比數列、J曲線。

source:內政部
Taipei Time