Demographics of Indonesia local ethnic languages are the first language of most Indonesians and are still important. Indonesia demographic composition has a relatively young population. According to 2011 estimate, total median age of Indonesia is 28.2 years. Total Fertility Rate (TFR) (Wanted Fertility Rate) and Crude Birth Rate (CBR): Total fertility rate (TFR) and population over age 60 by region as of 2010: Source: "UN World Population Prospects" There are over 300 ethnic groups in Indonesia. 95% of those are of Native Indonesian ancestry. Javanese is the largest group with 100 million people (42%), followed by Sundanese who number nearly 40 million (15%).
Poverty in Indonesia own due to economic, cultural, linguistic and physical isolations which set it apart from the rest of Indonesia. In February 1999, as much as 47.97 million people were classified as poor, representing 47.43% of the nation's population. However, this figure must take into account the slide of the rupiah in the Asian financial crisis. By July 2005, that number had been reduced to 35.10 million, representing 41.97% of the total population. Latest available figures, March 2007, show that 37.17 million people are under the poverty line representing 20.58% of the entire population. Based on a report from the Asian Development