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%).
National costume of Indonesia Muslim men) throughout the country. The "peci" is usually worn with "batik" shirt or western-style suits by men in Indonesia for those attending formal occasions. It is also commonly worn during Islamic religious occasions. Senior citizen Muslim men across Indonesia — usually in Jakarta who identify themselves as native Betawi people, also use this "peci" on an everyday basis. It is also a traditional head-dress of the Betawi people and also other ethnic groups, especially in the western parts of Indonesia which are mainly Muslims. Other than national costumes, each of the provinces of Indonesia — more precisely every ethnic