Immigration is an essential component of the population. Results of the 2011 Population Census indicated that 326,376 (59.1% of the total population) were born outside Macau, an increase of 3.0 percentage points over the last ten years. Analysed by place of birth, 255,186 (46.2%) were born in Mainland China, down by 1.2 percentage points from 2001.  226,127 (40.9%) were born in Macau, 19,355 (3.5%) in Hong Kong and 1,835 (0.3%) in Portugal. There were more persons born in other countries or territories as the number of non-resident workers increased. Among them, 14,544 were born in the Philippines, 7,199 in Vietnam and 6,269 in Indonesia, altogether taking up 5.1% of the total population. 1,942 were born in Europe other than Portugal, 2,252 in Americas, 959 in Africa and 672 in Oceania. Analysed by age group, 85.2% of the youth population (aged 0-14) were born in Macau, and 62.9% of those aged 35 and above were born in Mainland China.. How many percent of the youth population were not born in Macau?