The ethnic Chinese population in Indonesia grew by an average of 4.3 percent annually between 1920 and 1930. It then slowed owing to the effects of the Great Depression and many areas experienced a net emigration. Falling growth rates were also attributed to a significant decrease in the number of Chinese immigrants admitted into Indonesia since the 1950s. The population is relatively old according to the 2000 census, having the lowest percentage of population under 14 years old nationwide and the second-highest percentage of population over 65. Their population pyramid had a narrow base with a rapid increase until the 15–19 age group, indicating a rapid decline in total fertility rates. This was evidenced by a decline in the absolute number of births since 1980. In Jakarta and West Java the population peak occurred in the 20–24 age group, indicating that the decline in fertility rates began as early as 1975. The upper portion of the pyramid exhibited a smooth decline with increasing population age. It is estimated that 60.7 percent of the Chinese Indonesian population in 2000 constitutes the generation that experienced political and social pressures under the New Order government. With an average life expectancy of 75 years, those who spent their formative years prior to this regime will completely disappear by 2032.