Fertility Transition among Major Ethnic Groups in Sarawak, Malaysia: Historical Trends, Socioeconomic Drivers and Future Implications

Abstract

Fertility decline is reshaping population growth, age structure, and social reproduction across Malaysia, yet long-term ethnic comparisons for Sarawak remain limited. This study examines historical birth-rate transition among the Iban, Chinese, Malay, Bidayuh, Orang Ulu, and Melanau populations using annual civil-registration series from the Sarawak Yearbook of Statistics and population-census reports for 1949–2009. The analysis combines descriptive trend comparison, proportional decline in crude birth rates, decadal slopes, cross-group dispersion statistics, and changes in natural increase. Because early civil registration was incomplete for several rural populations, the main comparison emphasizes the 1980s–2000s, when registration was substantially more complete. Across this period, all six groups recorded lower crude birth rates. The Malay population experienced the largest proportional reduction, from 34.0 to 21.8 births per 1,000 population (35.9%), followed by the Bidayuh (32.7%), Chinese (29.7%), Melanau (24.2%), Iban (23.7%), and Orang Ulu (21.2%). Cross-group differences narrowed, while natural increase declined in every group. These patterns are linked to education, urbanization, delayed marriage, women’s employment, healthcare improvement, family planning, rising child-rearing costs, and changing family aspirations. Sarawak’s fertility decline has continued into a below-replacement context, with implications for ageing, labor-force replacement, rural continuity, and family-support policy and long-term demographic sustainability across diverse ethnic communities.